Hemoperitoneum In A Mare Following Rupture Of A Granulosa-Theca Cell Tumor

Abstract

An 18-year old Quarter Horse mare with a five-month history of suspected granulosa-theca cell tumor on the right ovary was presented with acute abdominal pain. The mare was displaying signs of cardiovascular shock on arrival so attempts were made to stabilize her while performing further diagnostic tests. Transabdominal ultrasound examination revealed a large, well-demarcated mass in the right caudal abdomen and a significant peritoneal effusion, which was confirmed to be hemorrhagic following abdominocentesis. Transrectal ultrasound examination confirmed a large, multi-loculated right ovarian mass. Despite aggressive medical therapy the mare continued to show signs of cardiovascular deterioration. Serial blood samples and repeated abdominal ultrasonography were consistent with uncontrolled intra-abdominal hemorrhage. Based on the mare’s clinical deterioration euthanasia was elected. Postmortem examination confirmed rupture of a granulosa-theca cell tumor on the right ovary associated with profuse intraabdominal hemorrhage.