A 35-year-old Moroccan woman presented with a five-month history of intermittent abdominal pain and one episode of bleeding from the rectum. At physical examination an abdominal mass has noted. Abdominal sonography revealed a 6.3 × 8.5 cm midline mass in her upper abdomen that was quite tender. In transverse section, the mass had the multiple concentric rings of hypoechoic and echogenic layers associated with the sonographic appearance of intussusception. In longitudinal section, the sonographic aspect of multiple parallel lines gave the so-called "sandwich appearance" sign as seen in Figure. A corresponding contrast-enhanced abdominal CT also demonstrated the intussusception. Surgery confirmed a colocolic intussusception with a large, firm, indurated mass as the lead point. Because of the concern for possible malignancy, a right hemicolectomy was undertaken. The resected ascending colon was then opened up, and a protruding tumor of the ascending colon, which was acting as the lead point, was found. The tumor measured 7.6 × 6.9 × 2.4 cm. Pathology diagnosed an infiltrating, differentiated adenocarcinoma of her ascending colon invading through the muscularis propria. No lymphovascular invasion was seen. She has recovered well.