Abstract
A 46-year-old woman was found on ultrasonography (US) and computed tomography (CT) to have a cystic mass containing a crescent-shaped solid portion in the head of the pancreas, measuring 5 cm in diameter. Endoscopic retrograde cholangiopancreatography (ERCP) showed a normal main pancreatic duct, and genetic analysis of the pancreatic juice revealed a point mutation of the K-ras gene. During surgery we found a cystic mass with a well-defined capsule in the head of the pancreas, and extirpated the tumor. A pathological study during the surgery revealed no malignant regions in the solid component of the tumor. The resected specimen revealed a cystic portion containing a mucous, hyaline like liquid and a yellow-colored solid mass. Microscopic examination showed an S-100-positive schwannoma with Antoi A-type cells. The patient's post operative course was uneventful and no evidence of recurrence has been found until 8 years after the surgery.
