[Retro-rectal cystic tumors of developmental origin in adults. Apropos of 2 cases].

Two cases of recto-rectal congenital developmental cysts are described in young women (37 and 38 years). One was a duplication cyst of the rectum in association with two epidermoid cysts detected by US exploration in an asymptomatic woman, during pregnancy. The other case was a Tailgut cyst revealed by a retro-rectal abcess. In two cases, a pelvic CT Scan with rectal barium instillation for contrast and MRI exploration, revealed relationships and components of the developmental cysts. The treatment was a complete surgical excision via a Karske's approach, with coccygeal resection.