A new method of intraoperative cytodiagnosis was performed for one patient with occult neoplasms of the pancreas in order to locate the original site of cancer cells, using a balloon catheter. Cancer cells were detected in the pancreatic juice obtained from the pancreatic body only. The pancreatic body was removed, and the tail of the pancreas was anastomosed to the stomach. The post operative course was good without diabetes, and it was confirmed histologically that minimally invasive adenocarcinoma existed in the pancreatic body. Thus this procedure is beneficial because it can preserve as much pancreatic function as possible without losing the chance of cure by surgery.
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