Posterior Fourchette
Definition
The posterior midline junction where the labia minora meet, at the inferior border of the vaginal introitus. The most frequently reported site of anogenital injury after penetrative vaginal assault in research literature.
- Location
- Posterior midline junction of the labia minora
- Adjacent structure
- Inferior border of the vaginal introitus
- Clinical significance
- Most frequently reported anogenital injury site after penetrative vaginal assault
- Examined via
- Anogenital injury documentation in sexual assault exams
Common questions
Why is this specific site injured more often than other anogenital locations?+
Its position at the lower margin of the introitus places it under the greatest mechanical stress during penetration, making it the point most likely to tear or abrade even when injury elsewhere is minimal or absent.
Does the absence of injury here rule out penetrative assault?+
No. Anogenital examination studies consistently find that a substantial proportion of confirmed assaults leave no visible injury at all, so a normal finding at the posterior fourchette or anywhere else cannot be used to exclude assault.
Related terms
- Fossa Navicularis
- The shallow fossa between the posterior fourchette and the hymenal ring, anterior to the fourchette. An anatomically vulnerable zone often involved in...
- Hymenal Remnants
- Tissue tags remaining from the hymenal membrane. In adults, remnants are normal findings and should not be described as evidence of prior...
- Injury-Free Assault
- The documented phenomenon whereby penetrative sexual assault produces no detectable anogenital injury in a significant proportion of cases. Supported by multiple prospective...
- TEARS
- The systematic mnemonic for anogenital findings: Tears (lacerations or fissures), Ecchymosis (bruising), Abrasions (superficial skin loss), Redness (erythema, which may be non-specific),...
- Vestibular Papillomatosis
- A normal variant consisting of symmetrical micropapillary projections on the inner labia minora and vestibule. Often mistaken for condylomata acuminata (genital warts)...