Marble-induced Pyometra in an Appaloosa Mare

Marble-induced pyometras have not been reported previously. This case reports a new possible complication of using intrauterine marbles to suppress estrus in mares. No reproductive history was available. Pyometra, endometritis or vaginitis were suspected. Transrectal palpation, transrectal ultrasound and fluid cytology were performed. Transrectal ultrasound revealed a corpus luteum and a large fluid-filled uterus. A 34-mm round hyperechoic structure was noted in the left uterine horn. The cervix was firm. [...]