Giant Sigmoidal Lipoma Protruding Through Anal Canal and Causing Sigmoido-rectal Intussusception

Abstract

Intussusception is a rare condition in adulthood and there exists an underlying pathological lesion in most cases. Colorectal lipoma is the second most common benign tumour of the colon. Although commonly asymptomatic, it can present with intussusception. We, herein, report a case of a 79-year female with a yellowish mass with irregular surface prolapsing through the anal canal. In computed tomography (CT), sigmoido-rectal intussusception plus a lesion with the regular borders originating from the distal sigmoid colon protruding through the anal canal were observed. We resected the lesion with a transanal approach, following which the intussusception resolved spontaneously. Histopathological examination had reported lipoma. Transanal resection is a safe and efficient method of the treatment in distal colorectal lipomas presenting with intussusception.