Surgery All of the following are true about carcinoid tumors except: A Ileum is the commonest site in GIT B Commonest site for malignant carcinoid is distal ileum C Elevated urinary 5-HIAA is diagnostic of carcinoid syndrome D Commonest valvular disease in carcinoid syndrome is pulmonary stenosis 💡 Explanation All of the following are true about carcinoid tumors except: ✓ Correct Answer: D. Commonest valvular disease in carcinoid syndrome is pulmonary stenosis