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Dysgerminoma in an Arabian filly
A M Chandra1, J C Woodard, A M Merritt
1Department of Pathobiology, College of Veterinary Medicine, University of Florida, Gainesville 32610, USA.
Veterinary Pathology
|July 31, 1998
Summary
This report details a rare ovarian germ cell tumor in a horse, characterized by weight loss, anemia, and abdominal masses. The study provides the first in-depth analysis of this unique equine neoplasm.
Area of Science:
- Veterinary Pathology
- Equine Neoplasia
- Reproductive Oncology
Background:
- Germ cell tumors are rare in horses, with limited detailed case reports.
- Ovarian neoplasms can present with non-specific clinical signs in equine patients.
Observation:
- A yearling Arabian filly presented with severe weight loss, anemia, and peritoneal effusion.
- Necropsy revealed a large ovarian mass with widespread abdominal metastasis.
Findings:
- Histopathology identified a rare ovarian germ cell tumor with sheets of polygonal cells, necrosis, and positive alkaline phosphatase staining.
- Immunohistochemistry showed vimentin expression and cytokeratin negativity.
- Ultrastructural analysis revealed characteristic nucleolar morphology.
Implications:
- This case contributes to the understanding of rare equine ovarian germ cell tumors.
- Highlights the importance of thorough diagnostic evaluation for unexplained weight loss and anemia in horses.
- Provides a detailed reference for veterinary pathologists and oncologists studying equine neoplasms.