In this VETgirl online veterinary continuing education blog, we demonstrate what vaginal hyperplasia looks like in a dog. This is often seen in brachycephalic breeds (e.g., English bulldogs, boxers, etc.). While this is often called “hyperplasia,” histologically, the swelling/mass-effect is often due to edema and fibroplasia.1 This is often seen during the bitch’s first three estrus cycles.1 While spontaneous regression can occur during metestrus, there is a high risk of reoccurence.  Hyperplasia or masses associated with the vestibule or vagina can present as acute “mass” presentation. Ideally, the patients should be anesthetized, and have a urinary catheter placed, the hyperplastic mass removed (and biopsied) by episiotomy, and the patient spayed to help reduce reoccurence due to hormonal effects.


1. Pettit GD. Vagina and Vulva. In Bojrab MJ, Ellison GW, Slocum B, eds. Current Techniques in Small Animal Surgery. pp 503.

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