Abstract
A 675-g, 1.4-year-old, female African pygmy hedgehog (Atelerix albiventris) was evaluated for progressive abdominal distension of 2 months duration. A large mass within the abdominal cavity was detected by radiography, ultrasonography, and computed tomography. The irregular, multilobulated mass, containing calcified, necrotic, and fatty areas was consistent with fused bilateral ovaries. Cytology of the mass suggested an ovarian adenoma or adenocarcinoma. The hedgehog died approximately 3 months after the initial presentation. Postmortem computed tomography and necropsy examination revealed a large bilaterally fused ovarian mass with peritoneal metastases. Histologically, the masses were composed of a variety of tissues from all 3 germ layers, including immature (embryonic) cells and neoplastic cells in the lymphatic system, which was consistent with malignant ovarian teratomas. This is the first report to describe malignant ovarian teratomas in a hedgehog.
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