Anorectal hamartoma in a neonate: a unique anorectal mass.

Neonates presenting with perineal masses are uncommon. When encountered, most perineal masses are anorectal malformations, sacrococcygeal teratomas, rectal prolapse, or duplication cysts. We present an otherwise healthy newborn with a patent anal canal and a pedunculated anal mass. The mass was initially believed to be a prolapsed rectal duplication cyst. Further evaluation for concomitant congenital abnormalities was negative. The patient underwent mass excision at the bedside under local anesthesia. Histopathologic evaluation revealed benign hamartoma. This case is presented because of its rarity, unique presentation, and simplicity of management.