Sigmoidorectal Intussusception Presenting as Prolapse Per Anus in an Adult

Adult intussusception is a rare entity with enteric intussusception more common than colonic intussusception. While benign lesions account for most of the enteric intussusception, malignancy is the most common cause of colonic intussusception in adults. Intussusception presenting as mass per rectum has been reported in children and is most commonly due to ileocolic intussusception. Usually adult colonic intussusceptions are managed with resection without reduction due to fear of spillage or dissemination of malignant cells. But coloanal intussusception is an exception where reduction should be attempted initially to preserve sphincter. Though few cases of coloanal intus-susception are reported in adults, sigmoidorectal intussusception due to sigmoid colon carcinoma presenting as prolapse per anus is very rare and management remains a challenge