Abstract
A 67‐year‐old man who was followed up for 20 years for a diagnosis of chronic pancreatitis developed a unilocular cystic lesion in the pancreatic body and a gallstone. The cystic lesion (3.0 cm in diameter) was considered to be a pseudocyst with suspicion of a mucinous cystic tumor. Laparoscopic ultrasonography and fine‐needle aspiration (FNA) were performed following laparoscopic cholecystectomy. Under laparoscopic observation, the pinhole puncture was immediately closed. Analysis of the fluid revealed clusters of epithelial cells with mild atypia, remarkably elevated tumor markers (carcinoembryonic antigen and CA19‐9) and a K‐ras oncogene mutation. Distal pancreatectomy was performed 3 months after laparoscopic FNA and the pancreatic mass was diagnosed as an intraductal papillary tumor. The patient’s postoperative course was uneventful and he continues to do well without signs of recurrence. Laparoscopic FNA appears useful and safe for the diagnosis of cystic masses in the pancreas.
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