title: Meconium pseudocyst presenting as a buttock mass.
abstract: A newborn 2.4-kg baby girl with a prenatal diagnosis of sacrococcygeal teratoma by ultrasound had a soft cystic mass extending from the infracoccygeal region into the right buttock. The cyst contained meconium leading to a large retroperitoneal cavity. The cyst was drained through an extended buttock incision, and healed without a site of bowel perforation ever identified. Meconium pseudocyst should be included in the differential diagnosis of sacrococcygeal and buttock tumors in the newborn.
authors.affiliation: Section of Pediatric Surgery, Yale University School of Medicine, New Haven, CT 06510.
authors.forename: D K
authors.initials: DK
authors.lastname: West
authors.forename: R J
authors.initials: RJ
authors.lastname: Touloukian
mesh_terms: D002081:Buttocks; D003560:Cysts / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008470:Meconium; D009373:Neoplasms, Germ Cell and Embryonal / Q000175:diagnosis; D010538:Peritonitis / Q000175:diagnosis*; D013724:Teratoma / Q000175:diagnosis