Bilateral torsion of uterine horns in a nongravid bitch

Hematometra was diagnosed in a 13-year-old, nulliparous Toy Poodle by fine needle aspiration and radiographic studies, including pneumoperitoneography. Attempted uterine evacuation with simultaneous use of diethylstilbestrol and ergonovine was unsuccessful. Exploratory celiotomy revealed 1,080-degree torsion of the right uterine horn around the left horn, which was itself twisted 270 degrees. Ovariohysterectomy was performed without complications.