This paper describes a case of a sessile uterine leiomyoma in a 17-year-old chronic infertile Selle Francais mare. The mass was removed by transendoscopic electrocoagulation. In the same period, 725 mares were screened for oviductal and uterine solid masses in a slaughterhouse survey. Two uterine masses and one oviductal mass were detected in three different mares. Histological and immunohistochemical examination revealed leiomyoma in the four masses. To the authors' knowledge, this is the first report of an oviductal leiomyoma in a mare
