The computed tomography (CT) showed a mass in the small intestine with heterogeneous enhancement. A curative surgery was performed on the 21st day of admission. The tumor had adhered to the retroperitoneum because of localized peritonitis. The tumor size was 60 × 58 × 55 mm. ((a), (b)) Plain CT ((a) axial view, (b) coronal view). ((c), (d)) Enhanced CT ((c) axial view, (d) coronal view). (e) Gross appearance of the resected mass. (f) sections of the mass. Scale bar = 1 cm.