Lymphoplasmacytic endometritis and ovarian adenoma in a pinscher bitch associated with hydrometra

Abstract

Hydrometra is the accumulation of sterile fluid in the uterine lumen, asymptomatic and abnormally observed in bitches, often identified accidentally during ovariosalpingohysterectomy (OSH). The aim of this study is to report a case of hydrometra in a seven-year-old nulliparous female Pinscher dog, which was brought to the veterinarian due to a gradual increase in abdominal volume. Prior to the consultation, the dog had received a dose of medroxyprogesterone acetate (50 mg). Abdominal ultrasound revealed normal configurations of abdominal organs, except for the uterus, which displayed a lumen filled with anechoic, non-cellular content. During OSH, a considerable enlargement of uterine horns was observed, along with circulatory changes in the organ, such as congestion. The uterine horns were incised longitudinally, revealing clear, translucent, and non-viscous intrauterine fluid. Histopathological examination confirmed mild lymphoplasmacytic endometritis in the uterus and the presence of ovarian adenoma. Therefore, it is believed that ovarian adenoma and hydrometra may result from elevated circulating exogenous progestagen concentrations. Thus, the importance of veterinary medical monitoring is emphasized to prevent and identify possible alterations in the early stages of hydrometra.