Intussusception due to an inverted Meckel's diverticulum in adults is rare. We present a case report of a 28-year-old man with Meckel's diverticulum as a cause of ileo-ileal intussusceptions and lower gastrointestinal bleeding. The patient was admitted to the hospital with incomplete small bowel obstruction, abdominal pain and massive rectal bleeding. Surprisingly, pre-operative abdominal USG revealed inhomogeneous target-like mass in the right lower abdominal quadrant as intussusception with an intraluminal polypoid lesion. The patient underwent urgent laparotomy which confirmed ileo-ileal intussusception. The involved segment of small intestine (70 cm) was resected. The surgical specimen contained an elongated polypoid lesion of 8×2.5×2 cm within the ileal lumen. Histopathological examination ascertained an inverted Meckel's diverticulum. In the discussion, we deal with diagnosis and treatment issues of Meckel's diverticulum. Key words: inverted Meckel's diverticulum - intussusceptions - gastrointestinal bleeding - acute abdomen.
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