This elderly patient presented with a history of slowly progressing weight loss, fatigue, and anemia. No acute symptoms from the abdomen were present at examination.
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There is a large mass at the left colonic flexure. Proximal to it, the colon lumen is filled with mesenteric fat and vascular structures that lead towards the mass. The findings are consistent with a colocolic intussusception. The ileocolic valve can be identified in the right fossa and does not seem to be involved in the intussusception.
Colocolic intussusception in adults is most commonly due to a neoplasm acting as leading point.
Indeed, surgery confirmed a colonic carcinoma located near the right colonic flexure as the cause of intussusception in this specific case.
The clinical presentation of this patient, without prolonged symptoms such as fatigue and anemia rather than acute abdominal pain, suggests that the identiefied intussusception was long standing.