Residual Abscess of Anal Canal Duplication Developing in Adulthood: A Case Report

Abstract

The patient was a 23-year-old female, who underwent a radical operation of anal canal duplication at the age of 8 months. Although she had no complications associated with the disease during her childhood, she felt discomfort during defecation and lower abdominal pain for half a year. Abdominal CT revealed a cystic tumor lesion in the pelvis and she was referred to the Department of Pediatric Surgery. Further examination showed a 4-cm-diameter lesion located between the rectum and the sacrum, and rectal duplication or remnant of anal canal duplication was suspected. Surgical treatment was performed; the tumor and rectum did not share a common wall and the lesion was extracted without rectal wall resection. Furthermore, histopathological analysis showed that the wall of the lesion was lined by granulation tissue and an anal gland, which contained pus fluid, and the final diagnosis was residual abscess of anal canal duplication. Although to the best of our knowledge there has been no case report of residual abscess of gastric tract duplication, the complete resection of the mucosa of the duplication tissue is considered necessary as the initial surgical approach.