Читать книгу Ridley's The Vulva - Группа авторов - Страница 51

A perineal groove is a rare ano‐perineal malformation, but the cause is unclear. It may be due to a failure of the genital folds to fuse or a defect in the urorectal septum. Exposed mucosa extends from the fourchette to the anus and most resolve spontaneously [77]. An imperforate anus or anal stenosis may be associated with a variety of abnormalities of the genital tract and vulva [78]. An ectopic opening of the lower gastrointestinal tract may be found in the vagina or elsewhere in the perineum. When a rectovaginal fistula is formed, there are often urinary tract abnormalities present as well [79].