Ileocecal intussusception caused by lung cancer metastasis.

Intussusception is a rare clinical finding in adults. Most cases occur in the distal small bowel or large intestine. We report the case of a 65-year-old woman with known non-small-cell lung cancer (NSCLC) who presented with acute abdomen and ileus-like symptoms. Abdominal computed tomography suggested ileocecal intussusception. The patient underwent right hemicolectomy and the histopathological workup showed ileal NSCLC metastasis as the lead lesion of intussusception. The classic triad of cramping abdominal pain, bloody diarrhea and a palpable tender mass, which is present in the majority of pediatric patients, is only infrequently observed in adults. Thus, symptoms are often nonspecific and the clinical presentation may be inconspicuous. Because of the large proportion of structural anomalies, adult intussusception requires definitive treatment, of which surgical resection is the treatment of choice. In patients with colocolonic or ileocolonic intussusception, malignancy should be considered and therefore en bloc resection rather than reduction is the recommended surgical technique, whereas cases of enteric intussusceptions may be reduced by limited resection of the small intestine.