Neoplasia of the female reproductive tract

The most common neoplasms of the reproductive tract of the mare are tumors of the ovary and the external genitalia. In contrast, tumors of the oviduct , uterus, cervix, vagina, and mammary gland are rare. In general, the overa ll incidence of reproductive tract neoplasia in the mare increases with age . Tumors of the internal genitalia of mares may remain undetected if a mare is not routinely examined for breeding or pregnancy diagnosis.