Abstract
A 73-year-old male was admitted to our hospital due to a sense of thirst. Elevation of HbA1c was detected, and dilatation of the main pancreatic duct was revealed by an abdominal US. An atrophic pancreas and dilatation of the main pancreatic duct from the body to tail were shown by abdominal CT, but no neoplastic lesions of pancreas. EUS images showed the dilated main pancreatic duct and an irregular, low echoic mass measuring 10mm in diameter located near to the dilated main pancreatic duct. To make a definite diagnosis, EUS-FNA was performed, and the pathological diagnosis was adenocarcinoma. Subtotal pancreatectomy was performed, and the final pathological diagnosis was invasive ductal carcinoma. However, two endocrine tumors were detected by chance in the pancreatic tail. Because their MIB-1 indexes were less than 1%, they were classified into low risk group. We had the experience of a small pancreatic carcinoma associated with endocrine tumor.
