A Case of Congenital Lateral Buttock Dermal Sinus With Recurrent Infection

Abstract

We report the case of a two-year-old boy with a fistula of the right buttock. The fistula was detected at one year of age without any symptoms. It became red, and pain with exudate fluid appeared at two years of age. He was treated with an antibacterial agent and by drainage at a previous hospital. He was brought to our hospital because of a recurrent infection in a short period. Magnetic resonance imaging showed a fistula of the right buttock, which ran to the retrorectal space, and surgery was performed to remove the fistula. He experienced recurrent infection two weeks after the initial surgery and was treated by drainage and with an antibacterial agent. CT revealed the remaining deep-seated abscess. After resolving the inflammation, he underwent surgery and the fistula was completely resected. Histopathological findings showed that the wall was covered with stratified squamous epithelia. We diagnosed the patient as having a congenital buttock sinus tract, but it is consistent with an atypical case of a congenital dermal sinus tract. There is a high possibility of recurrent infection in either case, and thus surgical resection should be considered even if the patient is asymptomatic.