Abstract
A 15-year-old boy presented with low back pain. Abdominal radiography performed by a local physician showed calcification in the left upper abdomen. Abdominal computed tomography (CT) revealed a mass, 60 mm in diameter, arising in the tail of the pancreas, and the patient was referred to our hospital. Contrast-enhanced CT, contrast-enhanced magnetic resonance imaging, and endoscopic retrograde pancreatography suggested a solid pseudopapillary neoplasm (SPN) . Laparoscopic distal pancreatectomy was performed. The tumor was a well-demarcated cystic lesion, measuring 7×7×5.5 cm. The cut surface of the tumor had a solid, hemorrhagic, and cystic appearance. Histopathological examination revealed that the tumor components were surrounded by a cystic wall showing hyaline fibrosis. The tumor cells showed funicular or nest-like structures, and the nuclei were round or oval. Calcification and cholesterin crystals were found in the stroma. Immunohistochemically, the tumor cells were positive for CD10, CD56, vimentin, and α1-antitrypsin. An SPN was thus diagnosed. We describe our experience with a boy who had an SPN with extremely marked calcification.
