Unilateral segmental aplasia of uterine horn associated with pyometra and vulvar hypoplasia in a bitch

The aim of this report was to describe a clinical case of unilateral segmental aplasia of the uterine horn and vulvar hypoplasia associated with pyometra as a complication in a bitch. The patient was presented with abdominal pain, excessive vulvar licking, anorexia and lethargy. The vulva was found hypoplastic, flushed and without any discharge. Ultrasonography revealed an enlarged tip of the left uterine horn filled with fluid. Blood laboratory analysis showed a marked leukocytosis, so diagnosis of pyometra was made. Laparotomy and ovariohysterectomy were performed. During the operation unilateral segmental aplasia of the right uterine horn was observed. This is a very rare case of segmental aplasia of the uterus associated with hypoplasia of the vulva and with clinical signs of systemic disease in the bitch.