Mucinous adenocarcinoma arising in a neovagina using the sigmoid colon thirty years after operation: a case report

Because of a relative rarity of the cases with an artificial vagina, the incidence of a case with malignant disease arising in the neovagina is extremely rare. A case of adenocarcinoma arising from a neovagina is presented with a review of the literature.

A neovagina was constructed using the sigmoid colon at the age of 23 for congenital agenesis of the vagina, Rokitansky-Küster-Hauser syndrome. Subsequently, the patient had regular sexual intercourse for about 20 years. At the age of 53, she came to our outpatient clinic with a complaint of vaginal bleeding, and adenocarcinoma was found at the anterior wall of the neovagina adjoining the introitus. Total resection of the neovagina and adjuvant radiotherapy was performed. The pathological diagnosis was mucinous adenocarcinoma.

In view of relatively low incidence of mucinous carcinoma arising in the sigmoid colon along with the ectopic localization, this case may have implications for the understanding of pathogenesis of sigmoid colon cancer.