Exophytic sigmoid colon cancer causing intussusception
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Bloody stools, stomach pain. The US suggested sigmoid malignancy. On colonoscopy, an exophytic sigmoid mass was found with resultant intussusception. Local staging.
An about 50 mm exophytic, intraluminal mass is seen arising from the sigmoid colon. The mass serves as the lead point for intussusception. Note the ring-like appearance of the invaginated wall of the sigmoid. Likely resultant fecal loading in the proximal large bowel. Several small, but suspicious local lymph nodes in the adjacent mesentery. Also note the incidental but significant luminal narrowing of the superior mesenteric artery caused by a soft luminal plaque.
Exophytic bowel masses can serve as the lead point for intussusception and are in fact the most common cause of it in the adult population.