In this paper, we reported a case of congenital aplasia of dorsal pancreas. This case in 35th case in Japan. The case is 72-year-old male. He feels general fatigability as chief complaint and was taken Diabetes Mellitus. In ERP examination, it was found a short main pancreatic duct of about 4.5 cm length and defect of pancreatic body and tail in Ultrasonogram and Computed Tomogram. In arteriography, it was not found feeding artery to pancreatic body and tail. Accordingly, we diagnosed this case as congenital defect of pancreatic body and tail. This one was normal range for P. F. D. andnormal exocrine pancreatic function. But, this one was operated because of taking cholecystolithiasis. On Retroperitoneal space that shoud be originally pancreatic body and tail, we confirmed only fat tissue without inflammation, fibrosis and carcinomatous tissue. We could not be confirmed Langerhans islet and pancreatic tissue in the biopsy sections of fat tissue.

Abdominal aortic aneurysm and cystic kidneys are both common diseases that have been increasingly detected due to the development of medical screening instruments, such as computed tomography and ultrasonography. We occasionally intraoperatively encounter abdominal aortic aneurysms accompanying cystic renal lesions. However, there have been extremely few reports about abdominal aortic aneurysms complicated by cystic renal disease. Large renal cysts or polycystic kidneys are at risk of rupture or intraoperative hemorrhage, and can hinder the surgical treatment of abdominal aortic aneurysm. Therefore, there is a significant need for surgeons to be able to preoperatively determine the potential of an interruption of the procedure, for example, due to a cystic lesion. In this paper, we report a case of a 77-year-old man with abdominal aortic aneurysm who complained of abdominal fullness due to the presence of large cystic lesions in both kidneys. Preoperatively we aspirated 1, 550ml percutaneously from bilateral renal cysts under ultrasonographic guidance, but did not instill sclerosing agents, such as ethanol. Three days after the percutaneous aspiration, surgical treatment of the abdominal aortic aneurysm (5.2cm in diameter), the left common iliac arterial aneurysm and the right common iliac arterial aneurysm (3.0 and 2.6cm in diameter) was performed through a median abdominal incision with a retroperitoneal approach. The arterial prosthesis used was a Y-shaped woven double velour vascular graft. The postoperative course was uneventful and the patient was discharged 14 days after the vascular reconstruction procedure. Our experience suggests that percutaneous aspiration of large renal cysts that might hinder the surgical procedure for abdominal aortic aneurysm is useful.