{"id":37061,"date":"2026-06-17T04:10:51","date_gmt":"2026-06-16T22:40:51","guid":{"rendered":"https:\/\/atsixty.com\/?p=37061"},"modified":"2026-06-17T22:49:57","modified_gmt":"2026-06-17T17:19:57","slug":"breast-thyroid-endocrine","status":"publish","type":"post","link":"https:\/\/atsixty.com\/index.php\/clinical\/surgery\/breast-thyroid-endocrine\/","title":{"rendered":"Breast, Thyroid &amp; Endocrine"},"content":{"rendered":"\n\n\n<meta charset=\"UTF-8\">\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n<title>Morning Rounds \u00b7 Breast, Thyroid &amp; Endocrine Surgery<\/title>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&#038;family=Source+Serif+4:ital,wght@0,300;0,400;0,600;1,400&#038;display=swap\" rel=\"stylesheet\">\n<style>\n#surg04 *,#surg04 *::before,#surg04 *::after{box-sizing:border-box;margin:0;padding:0}\n#surg04{\n  --surg:#2C5F8A;--surg-light:#3A78A8;--surg-pale:#EBF2F8;--surg-dark:#1E4464;\n  --correct:#2D6B47;--correct-bg:#EAF6EF;--correct-border:#3A9960;\n  --wrong:#B83232;--wrong-bg:#FDF0F0;--wrong-border:#E53935;\n  --ink:#1A2A38;--ink-mid:#3A5A6A;--ink-soft:#7A98AD;\n  --line:#D6E5EE;--cream:#F4F8FB;--warm:#FAFCFE;\n  font-family:'Source Serif 4',Georgia,serif;font-size:16px;color:var(--ink);\n  background:var(--cream);line-height:1.7;padding:0 0 64px;\n}\n#surg04 .mr-header{background:var(--surg);color:#EEF5FA;padding:34px 24px 28px;text-align:center}\n#surg04 .mr-eyebrow{font-size:0.68rem;letter-spacing:0.18em;text-transform:uppercase;font-weight:600;opacity:0.65;margin-bottom:10px}\n#surg04 .mr-title{font-family:'Playfair Display',serif;font-size:1.75rem;font-weight:700;line-height:1.2;margin-bottom:4px}\n#surg04 .mr-title em{font-style:italic;font-weight:400;opacity:0.88}\n#surg04 .mr-subtitle{font-size:0.82rem;opacity:0.7;margin-top:8px;font-style:italic}\n#surg04 .mr-chips{display:flex;justify-content:center;gap:10px;margin-top:18px;flex-wrap:wrap}\n#surg04 .mr-chip{background:rgba(255,255,255,0.13);border:1px solid rgba(255,255,255,0.22);border-radius:20px;padding:4px 13px;font-size:0.73rem}\n#surg04 .mr-sentinel{height:1px}\n#surg04 .mr-progress{position:fixed;top:0;left:0;right:0;z-index:9999;background:var(--warm);border-bottom:1px solid var(--line);box-shadow:0 2px 12px rgba(26,42,56,0.08);padding:9px 16px;display:none}\n#surg04 .mr-progress.visible{display:block}\n#surg04 .mr-prog-inner{max-width:720px;margin:0 auto;display:flex;align-items:center;justify-content:center}\n#surg04 .mr-pips{display:flex;align-items:center;justify-content:center}\n#surg04 .mr-pip-wrap{display:flex;align-items:center}\n#surg04 .mr-pip-line{width:28px;height:2px;background:var(--line);transition:background 0.35s}\n#surg04 .mr-pip-line.done{background:var(--surg)}\n#surg04 .mr-pip{width:28px;height:28px;border-radius:50%;border:2px solid var(--line);background:var(--warm);display:flex;align-items:center;justify-content:center;font-size:0.63rem;font-weight:700;color:var(--ink-soft);transition:all 0.3s;flex-shrink:0}\n#surg04 .mr-pip.correct{background:var(--correct-border);border-color:var(--correct-border);color:#fff}\n#surg04 .mr-pip.wrong{background:var(--wrong-border);border-color:var(--wrong-border);color:#fff}\n#surg04 .mr-body{max-width:720px;margin:0 auto;padding:0 16px}\n#surg04 .mr-case{background:var(--warm);border:1px solid var(--line);border-left:4px solid var(--surg);border-radius:10px;margin:28px 0;overflow:hidden;box-shadow:0 1px 6px rgba(26,42,56,0.05)}\n#surg04 .mr-case-top{padding:16px 20px 14px;display:flex;gap:14px;align-items:flex-start}\n#surg04 .mr-num{font-family:'Playfair Display',serif;font-size:2.2rem;font-weight:700;color:var(--surg);opacity:0.16;line-height:1;margin-top:-2px;flex-shrink:0}\n#surg04 .mr-meta{flex:1}\n#surg04 .mr-tag{font-size:0.61rem;font-weight:700;letter-spacing:0.14em;text-transform:uppercase;color:var(--surg);opacity:0.75;margin-bottom:5px}\n#surg04 .mr-stem{font-size:0.94rem;color:var(--ink);line-height:1.72}\n#surg04 .mr-stem strong{font-weight:600}\n#surg04 .mr-stem em{font-style:italic}\n#surg04 .mr-rule{height:1px;background:var(--line);margin:0 20px}\n#surg04 .mr-opts{padding:12px 20px 16px;display:flex;flex-direction:column;gap:8px}\n#surg04 .mr-opt{display:flex;align-items:flex-start;gap:11px;padding:10px 14px;border:1.5px solid var(--line);border-radius:8px;cursor:pointer;background:var(--warm);transition:border-color 0.15s,background 0.15s;-webkit-tap-highlight-color:transparent}\n#surg04 .mr-opt:hover{border-color:var(--surg);background:var(--surg-pale)}\n#surg04 .mr-opt.locked{cursor:default}\n#surg04 .mr-opt.locked:hover{border-color:var(--line);background:var(--warm)}\n#surg04 .mr-opt.correct{border-color:var(--correct-border);background:var(--correct-bg);cursor:default}\n#surg04 .mr-opt.correct:hover{border-color:var(--correct-border);background:var(--correct-bg)}\n#surg04 .mr-opt.wrong{border-color:var(--wrong-border);background:var(--wrong-bg);cursor:default}\n#surg04 .mr-opt.wrong:hover{border-color:var(--wrong-border);background:var(--wrong-bg)}\n#surg04 .mr-opt.dimmed{opacity:0.35;cursor:default}\n#surg04 .mr-opt.dimmed:hover{border-color:var(--line);background:var(--warm)}\n#surg04 .mr-ltr{flex-shrink:0;width:20px;height:20px;border-radius:50%;border:1.5px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:0.62rem;font-weight:700;color:var(--ink-soft);margin-top:2px;transition:all 0.15s}\n#surg04 .mr-opt.correct .mr-ltr{background:var(--correct-border);border-color:var(--correct-border);color:#fff}\n#surg04 .mr-opt.wrong .mr-ltr{background:var(--wrong-border);border-color:var(--wrong-border);color:#fff}\n#surg04 .mr-opt-text{font-size:0.9rem;color:var(--ink-mid);line-height:1.58}\n#surg04 .mr-opt.correct .mr-opt-text{color:var(--correct);font-weight:600}\n#surg04 .mr-opt.wrong .mr-opt-text{color:var(--wrong)}\n#surg04 .mr-exp{display:none;border-top:1px solid #b8d4e4;background:linear-gradient(180deg,#e4f0f7 0%,#f0f7fb 100%);padding:13px 20px 15px}\n#surg04 .mr-exp-lbl{font-size:0.61rem;font-weight:700;letter-spacing:0.12em;text-transform:uppercase;color:#1a5070;margin-bottom:6px}\n#surg04 .mr-exp-text{font-size:0.86rem;color:#12324A;line-height:1.68}\n#surg04 .mr-exp-text strong{font-weight:600}\n#surg04 .mr-exp-text em{font-style:italic}\n#surg04 .mr-img-wrap{margin-top:14px;background:var(--warm);border:1px solid var(--line);border-radius:8px;padding:14px;text-align:center}\n#surg04 .mr-img-wrap figcaption{font-size:0.73rem;color:var(--ink-soft);font-style:italic;margin-top:8px;line-height:1.4}\n#surg04 .mr-submit-wrap{text-align:center;padding:28px 16px 8px}\n#surg04 .mr-btn{background:var(--surg);color:#EEF5FA;border:none;border-radius:8px;padding:13px 44px;font-family:'Playfair Display',serif;font-size:1rem;font-weight:700;cursor:pointer;box-shadow:0 2px 8px rgba(44,95,138,0.28)}\n#surg04 .mr-btn:hover{background:var(--surg-dark)}\n#surg04 .mr-score{display:none;background:var(--warm);border:1px solid var(--line);border-top:4px solid var(--surg);border-radius:10px;margin:24px 0 0;box-shadow:0 2px 12px rgba(26,42,56,0.08);overflow:hidden}\n#surg04 .mr-score-in{padding:28px 24px;text-align:center}\n#surg04 .mr-score-ey{font-size:0.66rem;letter-spacing:0.14em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:12px;font-weight:600}\n#surg04 .mr-ring{width:98px;height:98px;border-radius:50%;background:conic-gradient(var(--surg) 0%,var(--line) 0%);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;position:relative}\n#surg04 .mr-ring::before{content:'';position:absolute;width:76px;height:76px;border-radius:50%;background:var(--warm)}\n#surg04 .mr-ring-in{position:relative;display:flex;flex-direction:column;align-items:center;line-height:1.2}\n#surg04 .mr-ring-pct{font-family:'Playfair Display',serif;font-size:1.3rem;font-weight:700;color:var(--surg)}\n#surg04 .mr-ring-sub{font-size:0.54rem;color:var(--ink-soft);text-transform:uppercase;letter-spacing:0.06em}\n#surg04 .mr-score-title{font-family:'Playfair Display',serif;font-size:1.15rem;font-weight:700;color:var(--ink);margin-bottom:4px}\n#surg04 .mr-score-net{font-size:0.9rem;color:var(--surg);font-weight:600;margin-bottom:4px}\n#surg04 .mr-verdict{font-size:0.83rem;color:var(--ink-soft);font-style:italic;margin-bottom:18px;padding:0 12px}\n#surg04 .mr-bands{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}\n#surg04 .mr-band{padding:5px 13px;border-radius:16px;font-size:0.78rem;font-weight:600}\n#surg04 .mr-band-c{background:var(--correct-bg);color:var(--correct)}\n#surg04 .mr-band-w{background:var(--wrong-bg);color:var(--wrong)}\n#surg04 .mr-band-s{background:var(--surg-pale);color:var(--surg)}\n#surg04 .mr-retry{display:block;margin:18px auto 4px;background:transparent;border:2px solid var(--surg);color:var(--surg);border-radius:8px;padding:9px 28px;font-family:'Playfair Display',serif;font-size:0.92rem;font-weight:700;cursor:pointer}\n#surg04 .mr-retry:hover{background:var(--surg);color:#EEF5FA}\n@media(max-width:480px){#surg04 .mr-title{font-size:1.4rem}#surg04 .mr-num{font-size:1.7rem}#surg04 .mr-stem{font-size:0.9rem}#surg04 .mr-opt-text{font-size:0.86rem}}\n<\/style>\n\n<!-- SVG Q2: Thyroid carcinoma \u2014 classification -->\n<div id=\"surg04-img2\" style=\"display:none\">\n  <figure class=\"mr-img-wrap\">\n    <svg viewBox=\"0 0 560 200\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:100%;max-width:560px;display:block;margin:0 auto\">\n      <rect x=\"0\" y=\"0\" width=\"560\" height=\"200\" rx=\"8\" fill=\"#f0f5f9\"\/>\n      <text x=\"14\" y=\"18\" fill=\"#1A2A38\" font-size=\"9.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Thyroid Carcinoma \u2014 Comparative Features<\/text>\n      <!-- Headers -->\n      <rect x=\"10\" y=\"24\" width=\"100\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <rect x=\"114\" y=\"24\" width=\"100\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <rect x=\"218\" y=\"24\" width=\"100\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <rect x=\"322\" y=\"24\" width=\"100\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <rect x=\"426\" y=\"24\" width=\"124\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <text x=\"60\"  y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Feature<\/text>\n      <text x=\"164\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Papillary<\/text>\n      <text x=\"268\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Follicular<\/text>\n      <text x=\"372\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Medullary<\/text>\n      <text x=\"488\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Anaplastic<\/text>\n      <!-- Frequency -->\n      <rect x=\"10\" y=\"48\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#dce8f0\"\/>\n      <text x=\"60\"  y=\"64\" text-anchor=\"middle\" fill=\"#1C3D52\" font-size=\"7\" font-family=\"Georgia,serif\" font-weight=\"bold\">Frequency<\/text>\n      <rect x=\"114\" y=\"48\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"164\" y=\"64\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7\" font-family=\"Georgia,serif\">MC (~80%)<\/text>\n      <rect x=\"218\" y=\"48\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"268\" y=\"64\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7\" font-family=\"Georgia,serif\">~10%<\/text>\n      <rect x=\"322\" y=\"48\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"372\" y=\"64\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7\" font-family=\"Georgia,serif\">~5\u20138%<\/text>\n      <rect x=\"426\" y=\"48\" width=\"124\" height=\"24\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"488\" y=\"64\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7\" font-family=\"Georgia,serif\">~2% (worst)<\/text>\n      <!-- Spread -->\n      <rect x=\"10\" y=\"74\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#dce8f0\"\/>\n      <text x=\"60\"  y=\"90\" text-anchor=\"middle\" fill=\"#1C3D52\" font-size=\"7\" font-family=\"Georgia,serif\" font-weight=\"bold\">Spread<\/text>\n      <rect x=\"114\" y=\"74\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"164\" y=\"90\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7\" font-family=\"Georgia,serif\">Lymphatic (LN)<\/text>\n      <rect x=\"218\" y=\"74\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"268\" y=\"90\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7\" font-family=\"Georgia,serif\">Haematogenous<\/text>\n      <rect x=\"322\" y=\"74\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"372\" y=\"84\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7\" font-family=\"Georgia,serif\">Lymphatic +<\/text>\n      <text x=\"372\" y=\"95\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7\" font-family=\"Georgia,serif\">haematogenous<\/text>\n      <rect x=\"426\" y=\"74\" width=\"124\" height=\"24\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"488\" y=\"90\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7\" font-family=\"Georgia,serif\">Direct invasion<\/text>\n      <!-- Marker -->\n      <rect x=\"10\" y=\"100\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#dce8f0\"\/>\n      <text x=\"60\"  y=\"116\" text-anchor=\"middle\" fill=\"#1C3D52\" font-size=\"7\" font-family=\"Georgia,serif\" font-weight=\"bold\">Tumour marker<\/text>\n      <rect x=\"114\" y=\"100\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"164\" y=\"116\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7\" font-family=\"Georgia,serif\">Thyroglobulin<\/text>\n      <rect x=\"218\" y=\"100\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"268\" y=\"116\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7\" font-family=\"Georgia,serif\">Thyroglobulin<\/text>\n      <rect x=\"322\" y=\"100\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"372\" y=\"116\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7\" font-family=\"Georgia,serif\" font-weight=\"bold\">Calcitonin<\/text>\n      <rect x=\"426\" y=\"100\" width=\"124\" height=\"24\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"488\" y=\"116\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7\" font-family=\"Georgia,serif\">None useful<\/text>\n      <!-- Origin -->\n      <rect x=\"10\" y=\"126\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#dce8f0\"\/>\n      <text x=\"60\"  y=\"142\" text-anchor=\"middle\" fill=\"#1C3D52\" font-size=\"7\" font-family=\"Georgia,serif\" font-weight=\"bold\">Cell of origin<\/text>\n      <rect x=\"114\" y=\"126\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"164\" y=\"142\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7\" font-family=\"Georgia,serif\">Follicular cell<\/text>\n      <rect x=\"218\" y=\"126\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"268\" y=\"142\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7\" font-family=\"Georgia,serif\">Follicular cell<\/text>\n      <rect x=\"322\" y=\"126\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"372\" y=\"142\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7\" font-family=\"Georgia,serif\" font-weight=\"bold\">C-cells (parafoll.)<\/text>\n      <rect x=\"426\" y=\"126\" width=\"124\" height=\"24\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"488\" y=\"142\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7\" font-family=\"Georgia,serif\">Follicular cell<\/text>\n      <!-- Histology trap -->\n      <rect x=\"10\" y=\"152\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#dce8f0\"\/>\n      <text x=\"60\"  y=\"162\" text-anchor=\"middle\" fill=\"#1C3D52\" font-size=\"7\" font-family=\"Georgia,serif\" font-weight=\"bold\">Diagnostic<\/text>\n      <text x=\"60\"  y=\"173\" text-anchor=\"middle\" fill=\"#1C3D52\" font-size=\"7\" font-family=\"Georgia,serif\" font-weight=\"bold\">histology<\/text>\n      <rect x=\"114\" y=\"152\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"164\" y=\"162\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7\" font-family=\"Georgia,serif\">Orphan Annie nuclei<\/text>\n      <text x=\"164\" y=\"173\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7\" font-family=\"Georgia,serif\">+ Psammoma bodies<\/text>\n      <rect x=\"218\" y=\"152\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"268\" y=\"162\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7\" font-family=\"Georgia,serif\">Capsular \/ vascular<\/text>\n      <text x=\"268\" y=\"173\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7\" font-family=\"Georgia,serif\">invasion on histology<\/text>\n      <rect x=\"322\" y=\"152\" width=\"100\" height=\"24\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"372\" y=\"162\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7\" font-family=\"Georgia,serif\">Amyloid stroma<\/text>\n      <text x=\"372\" y=\"173\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7\" font-family=\"Georgia,serif\">(Congo red +ve)<\/text>\n      <rect x=\"426\" y=\"152\" width=\"124\" height=\"24\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"488\" y=\"162\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7\" font-family=\"Georgia,serif\">Pleomorphic giant<\/text>\n      <text x=\"488\" y=\"173\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7\" font-family=\"Georgia,serif\">cells<\/text>\n      <!-- Prognosis -->\n      <rect x=\"10\" y=\"178\" width=\"540\" height=\"18\" rx=\"3\" fill=\"#2C5F8A\" opacity=\"0.10\"\/>\n      <text x=\"280\" y=\"191\" text-anchor=\"middle\" fill=\"#1E4464\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Prognosis best \u2192 worst: Papillary &gt; Follicular &gt; Medullary &gt; Anaplastic \u00b7 Anaplastic: median survival 3\u20136 months<\/text>\n    <\/svg>\n    <figcaption>\n      <strong>Key NEET traps:<\/strong> Follicular carcinoma <em>cannot<\/em> be diagnosed on FNAC alone \u2014 capsular\/vascular invasion is only seen on excision histology. Medullary carcinoma arises from C-cells (calcitonin-secreting, not follicular) \u2014 must screen for RET mutation and MEN 2. Papillary carcinoma spreads to lymph nodes but still carries the best prognosis.\n    <\/figcaption>\n  <\/figure>\n<\/div>\n\n<!-- SVG Q4: Phaeochromocytoma \u2014 Rule of 10s -->\n<div id=\"surg04-img4\" style=\"display:none\">\n  <figure class=\"mr-img-wrap\">\n    <svg viewBox=\"0 0 560 155\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:100%;max-width:560px;display:block;margin:0 auto\">\n      <rect x=\"0\" y=\"0\" width=\"560\" height=\"155\" rx=\"8\" fill=\"#f0f5f9\"\/>\n      <text x=\"14\" y=\"18\" fill=\"#1A2A38\" font-size=\"9.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Phaeochromocytoma \u2014 The Rule of 10s &amp; Surgical Preparation<\/text>\n      <!-- Rule of 10s -->\n      <rect x=\"10\" y=\"24\" width=\"265\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <text x=\"142\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Rule of 10s<\/text>\n      <rect x=\"10\" y=\"48\" width=\"265\" height=\"19\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"142\" y=\"61\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">10% bilateral<\/text>\n      <rect x=\"10\" y=\"69\" width=\"265\" height=\"19\" rx=\"2\" fill=\"#eef4f8\"\/>\n      <text x=\"142\" y=\"82\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">10% extra-adrenal (paraganglioma)<\/text>\n      <rect x=\"10\" y=\"90\" width=\"265\" height=\"19\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"142\" y=\"103\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">10% malignant<\/text>\n      <rect x=\"10\" y=\"111\" width=\"265\" height=\"19\" rx=\"2\" fill=\"#eef4f8\"\/>\n      <text x=\"142\" y=\"124\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">10% familial (MEN 2A\/2B, VHL, NF1)<\/text>\n      <rect x=\"10\" y=\"132\" width=\"265\" height=\"19\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"142\" y=\"145\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">10% in children<\/text>\n      <!-- Pre-op prep -->\n      <rect x=\"280\" y=\"24\" width=\"270\" height=\"22\" rx=\"3\" fill=\"#1E4464\"\/>\n      <text x=\"415\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Pre-operative Preparation (Critical)<\/text>\n      <rect x=\"280\" y=\"48\" width=\"270\" height=\"19\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"415\" y=\"61\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Step 1: Alpha-blockade first (phenoxybenzamine 10\u201314 days)<\/text>\n      <rect x=\"280\" y=\"69\" width=\"270\" height=\"19\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"415\" y=\"82\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">Prevents hypertensive crisis during tumour handling<\/text>\n      <rect x=\"280\" y=\"90\" width=\"270\" height=\"19\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"415\" y=\"103\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Step 2: Beta-blockade added AFTER alpha is established<\/text>\n      <rect x=\"280\" y=\"111\" width=\"270\" height=\"19\" rx=\"2\" fill=\"#eaf4f0\"\/>\n      <text x=\"415\" y=\"124\" text-anchor=\"middle\" fill=\"#2D6B47\" font-size=\"7.5\" font-family=\"Georgia,serif\">Prevents reflex tachycardia from alpha-blockade<\/text>\n      <rect x=\"280\" y=\"132\" width=\"270\" height=\"19\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"415\" y=\"145\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">NEVER give beta first \u2014 causes unopposed alpha \u2192 crisis<\/text>\n    <\/svg>\n    <figcaption>\n      The alpha-before-beta rule is the single most tested fact about phaeochromocytoma management. <strong>Phenoxybenzamine<\/strong> (irreversible non-selective alpha-blocker) is standard; prazosin\/doxazosin are alternatives. Beta-blockade (propranolol) is added only after adequate alpha-blockade to prevent reflex tachycardia. <strong>Surgery:<\/strong> laparoscopic adrenalectomy; ligate adrenal vein early to prevent catecholamine surge.\n    <\/figcaption>\n  <\/figure>\n<\/div>\n\n<!-- SVG Q5: MEN syndromes -->\n<div id=\"surg04-img5\" style=\"display:none\">\n  <figure class=\"mr-img-wrap\">\n    <svg viewBox=\"0 0 560 165\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:100%;max-width:560px;display:block;margin:0 auto\">\n      <rect x=\"0\" y=\"0\" width=\"560\" height=\"165\" rx=\"8\" fill=\"#f0f5f9\"\/>\n      <text x=\"14\" y=\"18\" fill=\"#1A2A38\" font-size=\"9.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">Multiple Endocrine Neoplasia \u2014 Classification<\/text>\n      <!-- Headers -->\n      <rect x=\"10\" y=\"24\" width=\"100\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <rect x=\"115\" y=\"24\" width=\"130\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <rect x=\"250\" y=\"24\" width=\"130\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <rect x=\"385\" y=\"24\" width=\"165\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\"\/>\n      <text x=\"60\"  y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Type<\/text>\n      <text x=\"180\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Gene \/ Chromosome<\/text>\n      <text x=\"315\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Components<\/text>\n      <text x=\"467\" y=\"39\" text-anchor=\"middle\" fill=\"#EEF5FA\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">Key surgical note<\/text>\n      <!-- MEN 1 -->\n      <rect x=\"10\" y=\"48\" width=\"100\" height=\"28\" rx=\"2\" fill=\"#dce8f0\"\/>\n      <text x=\"60\"  y=\"62\" text-anchor=\"middle\" fill=\"#1E4464\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">MEN 1<\/text>\n      <text x=\"60\"  y=\"73\" text-anchor=\"middle\" fill=\"#2C5F8A\" font-size=\"7\" font-family=\"Georgia,serif\">(Wermer)<\/text>\n      <rect x=\"115\" y=\"48\" width=\"130\" height=\"28\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"180\" y=\"62\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Menin (MEN1)<\/text>\n      <text x=\"180\" y=\"73\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Chromosome 11q13<\/text>\n      <rect x=\"250\" y=\"48\" width=\"130\" height=\"28\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"315\" y=\"58\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">3 Ps: Parathyroid (MC)<\/text>\n      <text x=\"315\" y=\"69\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Pituitary \u00b7 Pancreas<\/text>\n      <rect x=\"385\" y=\"48\" width=\"165\" height=\"28\" rx=\"2\" fill=\"#f0f5f9\"\/>\n      <text x=\"467\" y=\"58\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Parathyroidectomy (3\u00bd glands)<\/text>\n      <text x=\"467\" y=\"69\" text-anchor=\"middle\" fill=\"#12324A\" font-size=\"7.5\" font-family=\"Georgia,serif\">Gastrinoma \u2192 Zollinger-Ellison<\/text>\n      <!-- MEN 2A -->\n      <rect x=\"10\" y=\"78\" width=\"100\" height=\"28\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"60\"  y=\"92\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">MEN 2A<\/text>\n      <text x=\"60\"  y=\"103\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7\" font-family=\"Georgia,serif\">(Sipple)<\/text>\n      <rect x=\"115\" y=\"78\" width=\"130\" height=\"28\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"180\" y=\"92\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">RET proto-oncogene<\/text>\n      <text x=\"180\" y=\"103\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">Chromosome 10q11<\/text>\n      <rect x=\"250\" y=\"78\" width=\"130\" height=\"28\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"315\" y=\"88\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">Medullary thyroid Ca<\/text>\n      <text x=\"315\" y=\"99\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">Phaeochromocytoma<\/text>\n      <text x=\"315\" y=\"110\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7\" font-family=\"Georgia,serif\">Hyperparathyroidism<\/text>\n      <rect x=\"385\" y=\"78\" width=\"165\" height=\"28\" rx=\"2\" fill=\"#fdf3e0\"\/>\n      <text x=\"467\" y=\"88\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">Treat phaeochromocytoma<\/text>\n      <text x=\"467\" y=\"99\" text-anchor=\"middle\" fill=\"#7A4A00\" font-size=\"7.5\" font-family=\"Georgia,serif\">FIRST; then thyroidectomy<\/text>\n      <!-- MEN 2B -->\n      <rect x=\"10\" y=\"108\" width=\"100\" height=\"28\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"60\"  y=\"122\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"8\" font-family=\"Georgia,serif\" font-weight=\"bold\">MEN 2B<\/text>\n      <text x=\"60\"  y=\"133\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7\" font-family=\"Georgia,serif\">(most aggressive)<\/text>\n      <rect x=\"115\" y=\"108\" width=\"130\" height=\"28\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"180\" y=\"122\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">RET (codon 918)<\/text>\n      <text x=\"180\" y=\"133\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\">Chromosome 10q11<\/text>\n      <rect x=\"250\" y=\"108\" width=\"130\" height=\"28\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"315\" y=\"118\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\">Medullary thyroid Ca<\/text>\n      <text x=\"315\" y=\"129\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\">Phaeochromocytoma<\/text>\n      <text x=\"315\" y=\"140\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7\" font-family=\"Georgia,serif\">Mucosal neuromas \u00b7 Marfanoid<\/text>\n      <rect x=\"385\" y=\"108\" width=\"165\" height=\"28\" rx=\"2\" fill=\"#fdf0f0\"\/>\n      <text x=\"467\" y=\"118\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\">Prophylactic thyroidectomy<\/text>\n      <text x=\"467\" y=\"129\" text-anchor=\"middle\" fill=\"#B83232\" font-size=\"7.5\" font-family=\"Georgia,serif\">in infancy (&lt;6 months)<\/text>\n      <!-- Note -->\n      <rect x=\"10\" y=\"138\" width=\"540\" height=\"22\" rx=\"3\" fill=\"#2C5F8A\" opacity=\"0.10\"\/>\n      <text x=\"280\" y=\"153\" text-anchor=\"middle\" fill=\"#1E4464\" font-size=\"7.5\" font-family=\"Georgia,serif\" font-weight=\"bold\">MEN 2A\/2B: RET mutation = tumour suppressor LOSS? No \u2014 RET is a proto-oncogene (gain of function mutation). MEN 1: menin = tumour suppressor (loss of function).<\/text>\n    <\/svg>\n    <figcaption>\n      <strong>Sequence of surgery in MEN 2A:<\/strong> phaeochromocytoma must be resected <em>first<\/em> \u2014 undiagnosed phaeochromocytoma during thyroid surgery causes fatal hypertensive crisis. Always screen MEN 2 patients for phaeochromocytoma before any elective operation. MEN 2B is the most aggressive \u2014 prophylactic thyroidectomy before 6 months of age.\n    <\/figcaption>\n  <\/figure>\n<\/div>\n\n<div id=\"surg04\">\n  <div class=\"mr-header\">\n    <div class=\"mr-eyebrow\">Morning Rounds &middot; Surgery Series &middot; Round 04<\/div>\n    <div class=\"mr-title\">Breast, Thyroid &amp; Endocrine<br><em>Lumps, Hormones &amp; Hard Choices<\/em><\/div>\n    <div class=\"mr-subtitle\">Five cases &middot; Read carefully &middot; Trust your instinct<\/div>\n    <div class=\"mr-chips\">\n      <span class=\"mr-chip\">5 Cases<\/span>\n      <span class=\"mr-chip\">+4 \/ &minus;1 scoring<\/span>\n      <span class=\"mr-chip\">Options reshuffled<\/span>\n    <\/div>\n  <\/div>\n\n  <div class=\"mr-sentinel\" id=\"surg04-sentinel\"><\/div>\n  <div class=\"mr-progress\" id=\"surg04-progress\">\n    <div class=\"mr-prog-inner\">\n      <div class=\"mr-pips\" id=\"surg04-pips\"><\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"mr-body\">\n    <div id=\"surg04-cases\"><\/div>\n    <div class=\"mr-submit-wrap\">\n      <button class=\"mr-btn\" id=\"surg04-submit\">Submit for Debrief<\/button>\n    <\/div>\n    <div class=\"mr-score\" id=\"surg04-score\">\n      <div class=\"mr-score-in\">\n        <div class=\"mr-score-ey\">Round Complete<\/div>\n        <div class=\"mr-ring\" id=\"surg04-ring\">\n          <div class=\"mr-ring-in\">\n            <span class=\"mr-ring-pct\" id=\"surg04-pct\">0%<\/span>\n            <span class=\"mr-ring-sub\">net<\/span>\n          <\/div>\n        <\/div>\n        <div class=\"mr-score-title\">Your Debrief<\/div>\n        <div class=\"mr-score-net\" id=\"surg04-net\"><\/div>\n        <div class=\"mr-verdict\" id=\"surg04-verdict\"><\/div>\n        <div class=\"mr-bands\">\n          <span class=\"mr-band mr-band-c\" id=\"surg04-ct-c\"><\/span>\n          <span class=\"mr-band mr-band-w\" id=\"surg04-ct-w\"><\/span>\n          <span class=\"mr-band mr-band-s\" id=\"surg04-ct-s\"><\/span>\n        <\/div>\n        <button class=\"mr-retry\" id=\"surg04-retry\">&#8635; New Round<\/button>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<script>\n(function () {\n  'use strict';\n\n  var NS    = 'surg04';\n  var TOTAL = 5;\n  var MAX   = 20;\n  var LTRS  = ['A','B','C','D'];\n\n  var QS = [\n\n    {\n      id:    1,\n      tag:   'Breast &mdash; Nipple Discharge',\n      stem:  'A <strong>38-year-old woman<\/strong> presents with a <strong>3-month history of spontaneous blood-stained discharge from the right nipple<\/strong>, always from a single duct orifice. She has no palpable breast lump. There is no family history of breast cancer. Mammogram is reported as normal. On gentle pressure at the areolar margin, <strong>blood is expressible from one duct at the 10 o\\'clock position<\/strong>. What is the most likely diagnosis and the appropriate management?',\n      correct: 'Intraductal papilloma; microdochectomy (single duct excision) is the definitive treatment',\n      opts: [\n        'Intraductal papilloma; microdochectomy (single duct excision) is the definitive treatment',\n        'Duct ectasia; total duct excision (Hadfield\\'s operation) is indicated as it is the commonest cause of bloody nipple discharge',\n        'Carcinoma of the breast; mastectomy should be performed without further investigation given the bloody nature of the discharge',\n        'Physiological discharge; reassurance alone is appropriate as bilateral milky discharge in a woman of this age is common'\n      ],\n      exp:   '<strong>Intraductal papilloma<\/strong> is the <strong>most common cause of blood-stained (serosanguineous or frankly bloody) nipple discharge from a single duct<\/strong> in a woman of reproductive age. It is a benign, wart-like lesion of the major lactiferous ducts, typically 1\u20132 cm from the nipple. <br><br><strong>Key features pointing to papilloma:<\/strong> single duct, spontaneous, blood-stained, reproducible at the same location on areolar pressure \u2014 all present here. <br><br><strong>Triple assessment:<\/strong> clinical examination + mammogram + USS \u00b1 ductogram\/ductoscopy. Normal mammogram does not exclude it (papillomas are small, soft tissue lesions). Cytology of discharge is unreliable. <br><br><strong>Treatment: microdochectomy<\/strong> \u2014 excision of the offending duct under general anaesthesia; the duct is cannulated pre-operatively with a lacrimal probe. Histology is mandatory to exclude in-situ or invasive carcinoma. <br><br><strong>Duct ectasia<\/strong> (dilatation of major ducts, periductal mastitis) also causes nipple discharge but typically: <em>green\/cheesy or multicoloured, bilateral, multiple ducts, older women, associated with nipple retraction<\/em>. Treated with Hadfield\\'s operation (total duct excision) if symptoms are severe. <br><br><strong>Paget\\'s disease of the nipple<\/strong> \u2014 eczematous, erythematous change of the nipple-areola complex + underlying ductal carcinoma; skin biopsy shows Paget cells (clear halo cells). <br><br><strong>Physiological discharge:<\/strong> bilateral, milky, multiple ducts, expressible only \u2014 seen in pregnancy, lactation, hyperprolactinaemia.',\n      imgId: null\n    },\n\n    {\n      id:    2,\n      tag:   'Thyroid &mdash; Papillary Carcinoma &amp; FNAC',\n      stem:  'A <strong>32-year-old woman<\/strong> presents with an incidentally detected <strong>2 cm right thyroid nodule<\/strong>. She is euthyroid. USS shows a solid, hypoechoic nodule with irregular margins and microcalcifications (TIRADS 5). <strong>FNAC<\/strong> is reported as: <em>\"papillary structures with cells showing ground-glass (Orphan Annie eye) nuclei, nuclear grooves, and intranuclear pseudoinclusions. Psammoma bodies noted.\"<\/em> There is no palpable cervical lymphadenopathy. What is the most appropriate surgical management?',\n      correct: 'Total thyroidectomy; allows radioiodine ablation and reliable thyroglobulin surveillance for recurrence',\n      opts: [\n        'Total thyroidectomy; allows radioiodine ablation and reliable thyroglobulin surveillance for recurrence',\n        'Hemithyroidectomy (lobectomy) alone is sufficient for all papillary thyroid cancers under 4 cm',\n        'FNAC is unreliable for papillary carcinoma; repeat with Tru-cut biopsy before planning surgery',\n        'Radioiodine (I-131) therapy alone; surgery is not required for differentiated thyroid cancers detected incidentally'\n      ],\n      exp:   'The FNAC here is diagnostic of <strong>papillary thyroid carcinoma (PTC)<\/strong> \u2014 the most common thyroid malignancy (~80%). Hallmark cytological features: <strong>Orphan Annie eye nuclei<\/strong> (ground-glass, empty-looking), <strong>nuclear grooves and pseudoinclusions<\/strong>, <strong>Psammoma bodies<\/strong> (concentric calcified laminar structures \u2014 seen in ~50% of PTC). <br><br><strong>FNAC IS reliable for PTC<\/strong> \u2014 these cytological features are so characteristic that PTC is one of the few thyroid cancers diagnosable on FNAC. (The trap: follicular carcinoma cannot be diagnosed on FNAC because capsular\/vascular invasion \u2014 the defining criterion \u2014 requires excision histology.) <br><br><strong>Surgery for PTC:<\/strong> <br>&bull; <strong>Total thyroidectomy<\/strong> is preferred for tumours &gt;1 cm, bilateral disease, extrathyroidal extension, lymph node involvement, or distant mets. Advantages: (1) facilitates post-operative <strong>radioiodine (I-131) ablation<\/strong> of residual thyroid tissue; (2) allows use of <strong>thyroglobulin<\/strong> as a reliable tumour marker (undetectable Tg post-ablation = no recurrence). <br>&bull; <strong>Hemithyroidectomy<\/strong> is acceptable for unifocal, low-risk PTC &lt;1 cm (micropapillary carcinoma) with no high-risk features. For a 2 cm TIRADS 5 lesion, total thyroidectomy is appropriate. <br><br><strong>Post-operative:<\/strong> TSH suppression with levothyroxine (suppresses TSH-driven tumour growth) + I-131 ablation + serial thyroglobulin monitoring. <br><br><strong>Prognosis:<\/strong> excellent \u2014 10-year survival &gt;95% for low-risk PTC. Even lymph node mets (common in PTC) do not significantly worsen prognosis.',\n      imgId: 'surg04-img2'\n    },\n\n    {\n      id:    3,\n      tag:   'Thyroid &mdash; Post-Thyroidectomy Complications',\n      stem:  'A <strong>45-year-old woman<\/strong> underwent <strong>total thyroidectomy<\/strong> for multinodular goitre 18 hours ago. On the ward round, she complains of <strong>perioral tingling and numbness of the fingertips<\/strong>. On examination, <strong>Chvostek\\'s sign is positive<\/strong> (facial twitch on tapping over the parotid). Her serum calcium is reported as <strong>1.88 mmol\/L<\/strong> (normal 2.12\u20132.62). Her voice is hoarse but she is able to phonate. What is the immediate management and the most likely underlying cause of her calcium abnormality?',\n      correct: 'IV calcium gluconate; hypocalcaemia due to inadvertent removal or devascularisation of the parathyroid glands',\n      opts: [\n        'IV calcium gluconate; hypocalcaemia due to inadvertent removal or devascularisation of the parathyroid glands',\n        'Oral calcium supplementation only; post-thyroidectomy hypocalcaemia is always transient and does not require IV treatment at this calcium level',\n        'IV magnesium sulphate; the presentation is consistent with hypomagnesaemia-induced tetany, not hypoparathyroidism',\n        'Urgent re-exploration of the neck; the hoarseness confirms bilateral RLN injury requiring immediate surgical correction'\n      ],\n      exp:   '<strong>Post-thyroidectomy hypocalcaemia<\/strong> is the most common complication of total thyroidectomy, occurring in up to 30% transiently. Caused by <strong>inadvertent removal, devascularisation, or trauma to the parathyroid glands<\/strong> \u2192 \u2193 PTH \u2192 \u2193 serum Ca\u00b2\u207a. <br><br><strong>Symptoms<\/strong> (neuromuscular excitability): perioral tingling, fingertip paraesthesia, carpopedal spasm, laryngospasm, tetany, convulsions. Signs: <strong>Chvostek<\/strong> (twitch on tapping CN VII anterior to ear) and <strong>Trousseau<\/strong> (carpal spasm with BP cuff inflated above systolic for 3 minutes). <br><br><strong>Management:<\/strong> <br>&bull; Symptomatic \/ Ca\u00b2\u207a &lt;1.9 mmol\/L \u2192 <strong>IV calcium gluconate<\/strong> 10 mL of 10% solution slowly IV (not calcium chloride IV \u2014 causes tissue necrosis if extravasated), followed by infusion. <br>&bull; Asymptomatic \/ mild \u2192 oral calcium carbonate + alfacalcidol (active vitamin D \u2014 bypasses need for PTH-dependent renal activation). <br>&bull; Monitor PTH at 24 hours \u2014 if PTH recovers (transient hypoparathyroidism), oral supplements can be weaned. <br><br><strong>Permanent hypoparathyroidism<\/strong> (&lt;1% after total thyroidectomy by experienced surgeons) requires lifelong calcium + activated vitamin D. <br><br><strong>The hoarseness:<\/strong> consistent with <strong>unilateral RLN (recurrent laryngeal nerve) injury<\/strong> \u2014 causes ipsilateral vocal cord palsy. Voice is hoarse but airway is maintained (the contralateral cord compensates). Bilateral RLN injury \u2192 bilateral cord adduction \u2192 respiratory distress \u2192 emergency tracheostomy. Re-exploration is not indicated for a functioning voice.',\n      imgId: null\n    },\n\n    {\n      id:    4,\n      tag:   'Endocrine &mdash; Phaeochromocytoma',\n      stem:  'A <strong>28-year-old woman<\/strong> presents with <strong>episodic severe headaches, sweating, and palpitations<\/strong> lasting 20\u201330 minutes, occurring 2\u20133 times per week. During an episode in the clinic, her BP is <strong>210\/115 mmHg<\/strong>; between episodes it is 128\/82 mmHg. She has no family history of note. <strong>24-hour urinary metanephrines<\/strong> are significantly elevated at 3.8 &mu;mol\/mmol creatinine (normal &lt;0.35). MRI abdomen confirms a <strong>4 cm right adrenal mass<\/strong>. She is listed for laparoscopic right adrenalectomy. Which pre-operative pharmacological sequence is mandatory?',\n      correct: 'Alpha-adrenergic blockade (phenoxybenzamine) for 10&ndash;14 days first, then add beta-blockade once alpha is established',\n      opts: [\n        'Alpha-adrenergic blockade (phenoxybenzamine) for 10&ndash;14 days first, then add beta-blockade once alpha is established',\n        'Beta-adrenergic blockade (propranolol) commenced immediately to control the episodic tachycardia and hypertension',\n        'Calcium channel blocker (amlodipine) alone is sufficient pre-operative preparation and avoids the side-effects of alpha-blockade',\n        'No pre-operative pharmacological preparation is needed; laparoscopic adrenalectomy is safe without blockade if performed by an experienced surgeon'\n      ],\n      exp:   'This is a classic <strong>phaeochromocytoma<\/strong> presentation \u2014 the triad of <strong>episodic headache + sweating + palpitations<\/strong> with paroxysmal hypertension. Confirmed by elevated urinary metanephrines (most sensitive and specific biochemical test) and adrenal mass on MRI. <br><br><strong>Pre-operative preparation \u2014 the cardinal rule:<\/strong> <br><strong>1. Alpha-blockade FIRST<\/strong> \u2014 <strong>phenoxybenzamine<\/strong> (irreversible, non-selective alpha-1 and alpha-2 blocker) 10 mg BD, titrating up over 10\u201314 days. This prevents life-threatening hypertensive crisis when the tumour is handled during surgery. Side effects: postural hypotension (expected), nasal stuffiness. <br><strong>2. Beta-blockade AFTER<\/strong> \u2014 propranolol is added only once adequate alpha-blockade is achieved (postural drop confirms it), to control the reflex tachycardia from alpha-1 blockade and to prevent perioperative arrhythmias. <br><br><strong>Why never beta-first?<\/strong> Beta-blockade leaves alpha-adrenoceptors unopposed \u2192 severe peripheral vasoconstriction + hypertensive crisis. This is an absolute contraindication. <br><br><strong>Also mandatory:<\/strong> high-sodium diet + liberal fluid intake (expands contracted plasma volume); this prevents profound hypotension after tumour removal when catecholamine levels drop suddenly. <br><br><strong>Surgery:<\/strong> laparoscopic adrenalectomy \u2014 ligate the right adrenal vein (drains directly into IVC) early to reduce catecholamine surge. <br><br><strong>Extra-adrenal phaeochromocytoma<\/strong> (paraganglioma) \u2014 same management; most common site is organ of Zuckerkandl (at aortic bifurcation).',\n      imgId: 'surg04-img4'\n    },\n\n    {\n      id:    5,\n      tag:   'Endocrine &mdash; MEN Syndromes',\n      stem:  'A <strong>34-year-old man<\/strong> presents with a neck lump confirmed on FNAC as <strong>medullary thyroid carcinoma<\/strong>. His serum <strong>calcitonin is markedly elevated<\/strong>. He mentions his father died of a \"thyroid problem\" at 40. On further evaluation, <strong>24-hour urinary catecholamines are elevated<\/strong> and MRI shows a 2 cm left adrenal mass. Serum calcium is 2.82 mmol\/L (mildly elevated) with elevated PTH. Genetic testing confirms a <strong>RET proto-oncogene mutation<\/strong>. He is scheduled for surgery. What is the correct sequence of surgical intervention?',\n      correct: 'Resect the phaeochromocytoma first, then proceed to total thyroidectomy with central neck dissection',\n      opts: [\n        'Resect the phaeochromocytoma first, then proceed to total thyroidectomy with central neck dissection',\n        'Total thyroidectomy first as medullary thyroid carcinoma is the most lethal component and must be prioritised',\n        'Parathyroidectomy first to correct hypercalcaemia, then thyroidectomy, then adrenalectomy',\n        'All three operations should be performed simultaneously in a single anaesthetic to reduce overall surgical risk'\n      ],\n      exp:   'This patient has <strong>MEN 2A (Sipple syndrome)<\/strong> \u2014 medullary thyroid carcinoma + phaeochromocytoma + hyperparathyroidism, confirmed by <strong>RET proto-oncogene mutation<\/strong> (chromosome 10q11). <br><br><strong>The critical sequence rule:<\/strong> <strong>phaeochromocytoma must always be resected first<\/strong>, regardless of which tumour is symptomatic or appears most urgent. Undiagnosed or untreated phaeochromocytoma during thyroid or parathyroid surgery can cause a <strong>fatal intraoperative hypertensive crisis<\/strong> when catecholamines are released during tumour handling (or even during intubation and anaesthesia). <br><br><strong>Correct sequence for MEN 2A:<\/strong> <br>1. Pre-op alpha-blockade \u2192 laparoscopic adrenalectomy (phaeochromocytoma) <br>2. Total thyroidectomy + central compartment lymph node dissection (medullary carcinoma; calcitonin used for follow-up) <br>3. Parathyroidectomy if symptomatic hypercalcaemia (often can be addressed at the time of thyroidectomy \u2014 3\u00bd-gland parathyroidectomy with forearm autotransplantation) <br><br><strong>MEN 2A vs 2B:<\/strong> both have MTC + phaeochromocytoma; MEN 2A has hyperparathyroidism; MEN 2B has mucosal neuromas (lips\/tongue), marfanoid habitus, and no hyperparathyroidism. MEN 2B = most aggressive MTC \u2192 prophylactic thyroidectomy &lt;6 months of age. <br><br><strong>Calcitonin<\/strong> is the tumour marker for medullary carcinoma (C-cell origin) \u2014 not thyroglobulin (which is follicular cell-derived). Elevated calcitonin post-operatively = residual or recurrent disease.',\n      imgId: 'surg04-img5'\n    }\n\n  ];\n\n  var answers  = {};\n  var answered = 0;\n  var shuffled = {};\n  var done     = false;\n\n  function byId(id) { return document.getElementById(id); }\n  function gid(s)   { return byId(NS + '-' + s); }\n\n  function shuffleArr(arr) {\n    var a = arr.slice(), i, j, t;\n    for (i = a.length - 1; i > 0; i--) {\n      j = Math.floor(Math.random() * (i + 1));\n      t = a[i]; a[i] = a[j]; a[j] = t;\n    }\n    return a;\n  }\n\n  function countVal(v) {\n    var k, n = 0;\n    for (k in answers) { if (answers.hasOwnProperty(k) && answers[k] === v) n++; }\n    return n;\n  }\n\n  function buildPips() {\n    var cont = gid('pips'), i, q, wl, wp, l, p;\n    cont.innerHTML = '';\n    for (i = 0; i < QS.length; i++) {\n      q = QS[i];\n      if (i > 0) {\n        wl = document.createElement('div'); wl.className = 'mr-pip-wrap';\n        l  = document.createElement('div'); l.className  = 'mr-pip-line'; l.id = NS + '-pl' + q.id;\n        wl.appendChild(l); cont.appendChild(wl);\n      }\n      wp = document.createElement('div'); wp.className = 'mr-pip-wrap';\n      p  = document.createElement('div'); p.className  = 'mr-pip'; p.id = NS + '-pip' + q.id;\n      p.textContent = String(q.id);\n      wp.appendChild(p); cont.appendChild(wp);\n    }\n  }\n\n  function build() {\n    var cont, i, q, opts, card, top, num, meta, tag, stem,\n        rule, od, exp, lbl, txt, imgDiv, imgSrc, j, opt, ls, ts;\n    cont = gid('cases'); cont.innerHTML = '';\n    answers = {}; answered = 0; shuffled = {}; done = false;\n    gid('score').style.display = 'none';\n    buildPips();\n\n    for (i = 0; i < QS.length; i++) {\n      q = QS[i];\n      opts = shuffleArr(q.opts);\n      shuffled[q.id] = opts;\n\n      card = document.createElement('div'); card.className = 'mr-case';\n      top  = document.createElement('div'); top.className  = 'mr-case-top';\n      num  = document.createElement('div'); num.className  = 'mr-num';\n      num.textContent = q.id < 10 ? 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Follicular cell Diagnostic histology Orphan&hellip;&nbsp;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[74,56],"tags":[],"class_list":["post-37061","post","type-post","status-publish","format-standard","hentry","category-morning-rounds","category-surgery"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Breast, Thyroid &amp; Endocrine - atsixty<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atsixty.com\/index.php\/clinical\/surgery\/breast-thyroid-endocrine\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Breast, Thyroid &amp; Endocrine - atsixty\" \/>\n<meta property=\"og:description\" content=\"Morning Rounds \u00b7 Breast, Thyroid &amp; Endocrine Surgery Thyroid Carcinoma \u2014 Comparative Features Feature Papillary Follicular Medullary Anaplastic Frequency MC (~80%) ~10% ~5\u20138% ~2% (worst) Spread Lymphatic (LN) Haematogenous Lymphatic + haematogenous Direct invasion Tumour marker Thyroglobulin Thyroglobulin Calcitonin None useful Cell of origin Follicular cell Follicular cell C-cells (parafoll.) 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