Intussusception in adults: report of four cases and review of the literature.

Intussusception in adults is a rare clinical entity. The individual surgeon will not often encounter this condition. A lead-point for adult intussusception exists in 90% of cases and is frequently malignant. We present four cases and discuss treatment and diagnostic modalities. A comprehensive review of the literature is given. All cases were treated by resection according to oncologic principles without previous reduction. Histological examination showed non-Hodgkin lymphoma, lipoma, clear cell sarcoma and adenocarcinoma as the lead-points.