A patient with medullary thyroid carcinoma has a pathogenic RET variant and raised plasma metanephrines. They are clinically well. What must happen before thyroidectomy?
Undiagnosed catecholamine excess creates severe perioperative risk. Thyroid surgery should not precede appropriate adrenal evaluation, blockade and management.
A. Proceed with thyroidectomy because the cancer is malignant: Avoidable perioperative catecholamine crisis outweighs reflex operative sequencing.
B. Treat primary hyperparathyroidism first in every case: It may require assessment but is not the same immediate anaesthetic threat.
C. Ignore metanephrines if blood pressure is normal: Phaeochromocytoma can be clinically occult.
D. Use beta-blockade alone: Alpha-blockade principles must be considered before beta-blockade in catecholamine excess.
E. Confirm and manage phaeochromocytoma through an endocrine multidisciplinary pathway: Undiagnosed catecholamine excess creates severe perioperative risk. Thyroid surgery should not precede appropriate adrenal evaluation, blockade and management.
If catecholamine testing were negative, thyroid surgery could proceed with the remaining MEN2 assessment and counselling.
Draft Clinora educational material only; not official JCIE content or clinical advice.
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