<prompt> All of the following are true about carcinoid tumors except:Ileum is the commonest site in GITCommonest site for malignant carcinoid is distal ileumElevated urinary 5-HIAA is diagnostic of carcinoid syndromeCommonest valvular disease in carcinoid syndrome is pulmonary stenosis  <response>: o Bronchus is the commonest site for carcinoids in the GIT, ileum is the commonest siteo Ileum is the commonest site for malignant carcinoidso The commonest valvular lesion seen in carcinoids is tricuspid regurgitation 