<prompt> The most common site for carcinoma of the pancreas -HeadAmpullaBodyTail  <response>: Pancreatic carcinoma Pancreatic carcinoma is the most common malignant tumor of pancrease.Risk factorsSmoking Most consistent risk factor. Chronic pancreatitis ObesityHigh fat, low fibre diet.DiabetesPathologyPancreatic carcinoma are ductal adenocarcinomas.The most common site is head of pancreas. The distribution is as follows.Head 70Body 20Tail 10 