Sigmoidorectal intussusception in adults: a case report.

A 75-year-old women was admitted to our hospital due to anal bleeding from 5 days. At clinical examination abdomen was soft but tenderness in the lower quadrants, where a soft, mobile, round mass measuring 10 cm in diameter was palpable. CT scan demonstrated the presence of sigmoido-rectal intussusception. The patient underwent emergency anterior resection of rectum with stapled termino-terminal colo-rectal anastomosis. Postoperative course was uneventful and the patient was discharged 7 days after the operation. Histopathological examination demonstrated a tubular adenoma with low grade dysplasia, 1,2 cm in diameter, located in the distal sigmoid colon. Intussusception is a rather common pediatric condition that rarely presents in adults. Adults intussusception represents 5% of all cases of intussusception. In children it is usually primary and benign, and pneumatic or hydrostatic reduction of the intussusception is sufficient to treat the condition in 80% of patients. In contrast a demonstrable etiology is found in 70% to 90% of cases in adults, and approximately 40%-50% of them are caused by malignant neoplasms. Surgical intervention is necessary in all cases of intussusception in adults. Due to the low incidence and the rare consideration given to this condition among adults the preoperative diagnosis can be difficult, especially in emergency cases. Abdominal CT provides the most accurate diagnostic rate for intestinal intussusception.