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Malignant seminoma in a cryptorchid stallion
B L Smith1, L D Morton, J P Watkins
1Department of Large Animal Medicine, Texas Veterinary Medical Center, Texas A&M University, College Station 77843.
Journal of the American Veterinary Medical Association
|September 15, 1989
Summary
A 16-year-old cryptorchid horse experienced colic due to a large pelvic mass. Surgical removal of the seminoma led to fatal exsanguination, with metastasis found postmortem.
Area of Science:
- Veterinary Oncology
- Equine Surgery
Background:
- Cryptorchidism in horses can predispose to certain neoplasms.
- Colic is a common presenting sign for abdominal masses in horses.
Observation:
- A 16-year-old cryptorchid horse presented with colic and a large, lobulated soft-tissue mass near the pelvic inlet.
- Two large, multilobulated pedunculated masses were surgically removed.
Findings:
- The masses were diagnosed as malignant seminoma.
- A major blood vessel was damaged during surgery, leading to exsanguination.
- Postmortem examination confirmed widespread metastasis of the seminoma.
Implications:
- Malignant seminoma is a potentially aggressive tumor in horses.
- Surgical intervention for large abdominal masses carries significant risks, including hemorrhage.
- Early detection and diagnosis are crucial for managing equine neoplasms.