Unusual Presentation of a Rectovestibular Fistula as Gastrointestinal Hemorrhage in a Postmenopausal Woman

Table 1

Type, clinical presentation, and frequency of AVM diagnosed in female patients.

Type	Clinical presentation	Frequency
Vestibular fistula	Rectum opens immediately posterior to the vagina outside of the hymen	41%
Perineal fistula	Rectum opens immediately onto the perineum and is visible externally	28%
Imperforate anus with no fistula	No identifiable ARM noted; patient may show a “pinpoint anus”	5%
Rectal atresia and stenosis	Normal anal canal with normal sphincter mechanism	1%
Cloaca	Rectum, vagina, and urethra are fused as a single orifice	<1%

Peña and Hong, 2000 [1].