Computed tomographic findings in a canine ovarian teratoma

Abstract

A 2‐year‐old, intact female, Labrador Retriever was referred for progressive abdominal distension, assessed by emergency clinicians as being extrauterine in origin on AFAST. Abdominal radiographs and ultrasound identified a large, lobulated, partially mineralized, soft tissue, mid‐abdominal mass and gravid uterus. Contrast‐enhanced CT identified a mixed fat to soft tissue attenuating mass with a complex internal mineralized matrix, heterogeneous contrast enhancement, receiving blood from the left ovarian artery. Histology confirmed a left ovarian teratoma, diffuse endometrial hyperplasia, and fetal implantation. The patient had a good post‐operative outcome for 2 years, but was later diagnosed with primary cranial mediastinal neuroendocrine carcinoma.