Medicine All are seen in MEN IIA syndrome except A Medullary carcinoma of thyroid is seen in 100% of the patients B 40 - 30% patients have phaeochromocytoms C Caused by loss of function mutation in II protooncogene D Primary hyperparathyroidism is the most variable feature of MEN II A syndrome 💡 Explanation All are seen in MEN IIA syndrome except ✓ Correct Answer: C. Caused by loss of function mutation in II protooncogene