Case Outcome on Lucky: F/S dog with a vaginal mass (Did you get it right?)

Case outcome on "Lucky", a 4 year old female spayed dog with a large vaginal mass. (Fig. 1)

Fig. 1

Because of Lucky's history of intermittent blood tinged vaginal discharge, and the appearance of the mass, our clinical impression was that the mass was vaginal hyperplasia (also called vaginal edema). There was no history of the owners using any estrogen products on Lucky.  Vaginal hyperplasia would be more common in an intact dog, so we were suspicious that Lucky had an ovarian remnant. 

Abominal exploratory was performed and a left sided ovarian remnant was found. (Fig. 2) 

Fig. 2: ovarian remnant found on Lucky (arrow).
The left kidney (K) is just cranial to the ovary.

A uterine stump mass was also found. (Fig. 3) 

Fig 3: Uterine stump mass (arrow) on Lucky.
The urinary bladder (B) has been retracted caudally.

Both the ovary and uterine mass were excised. Histopathology confirmed a normal ovary and a uterine granuloma.

Postoperatively Lucky had an uneventful recovery and her vaginal hyperplasia gradually resolved over a period of a few weeks. 

Ovarian remnant syndrome (ORS) is more common than you might think. We will discuss the syndrome in more depth in the next blog.

Many of you made the correct diagnosis on this case.

Nice job!