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BMJ Case Rep. 2014 May 22;2014. pii: bcr2014204036. doi: 10.1136/bcr-2014-204036.

Prolapsed giant sigmoid lipoma: a rare cause of adult ischaemic intussusception.

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  • 1Department of Surgery, Causeway Hospital, Coleraine, Northern Ireland, UK.
  • 2Department of General Surgery, Causeway Hospital, Coleraine, Northern Ireland, UK.


Intussusception is a rare cause of obstruction in adults and has a variable, non-specific presentation. Adult intussusception is usually associated with an underlying organic pathology, such as a benign or malignant tumour which acts as the lead point. Prolapse of the lead-point mass through the anal canal is an extremely rare presentation with very few reported cases in the literature. We describe a case of a 67-year-old man who presented with rectal prolapse of a large soft tissue mass. CT of the abdomen and barium enema revealed partial intussusception of an upper sigmoid lipomatous polyp. Examination under anaesthesia was performed and the prolapse reduced. A laparoscopic sigmoid colectomy was planned. The patient subsequently re-presented clinically unwell with a recurrent necrotic prolapsing mass. Laparotomy and sigmoid colectomy was performed and the patient recovered fully. The resected mass was a 7×4.5×4.0 cm necrotic sigmoid lipoma.

2014 BMJ Publishing Group Ltd.

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