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World J Emerg Surg. 2011 Jun 13;6:19. doi: 10.1186/1749-7922-6-19.

Spontaneous expulsion from rectum: a rare presentation of intestinal lipomas.

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Department of Surgery, Larissa University Hospital, Larissa, Greece.


Lipomas are rare, subserosal, usually solitary, pedunculated small lesions appearing mainly in the large intestine with a minimal malignancy potential. They usually run asymptomatic and become symptomatic when they become enlarged or complicated causing intestinal obstruction, perforation, intusucception or massive bleeding. In rare cases they can be self-detached and expulsed via the rectum as fleshy masses. This event mainly occurs in large, pendunculated lipomas which detach from their pedicle. The reason for this event remains in most of cases unclear although in some cases a predisposing factor does exist. Abdominal pain and obstructive ileus may be observed while in many cases bleeding occurs. The expulsed mass sets the diagnosis and in most of the cases all symptoms subside. Diagnosis is rarely established before surgery with the use of barium enema, computed tomography and colonoscopy which additionally provides measures of treatment and diagnosis. In atypical cases though, in cases where the malignancy can not be excluded or in complicated cases, surgery is recommended. Usually the resection of the affected intestinal part is adequate. If during surgery a lipoma is encountered simple lipomatectomy seems also to be adequate.

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