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Malignant seminoma in two unilaterally cryptorchid stallions
V De Lange1, K Chiers, L Lefère
1Department Reproduction, Obstetrics and Herd health, Ghent University, Merelbeke, Belgium.
Reproduction in Domestic Animals = Zuchthygiene
|March 12, 2015
Summary
Malignant seminoma, a type of testicular cancer, was diagnosed in two stallions. The cancer had spread from the abdomen to the kidneys and other abdominal areas, and was also found in a descended testis.
Area of Science:
- Veterinary Oncology
- Equine Medicine
- Reproductive Endocrinology
Background:
- Cryptorchidism, the failure of testes to descend, is a known risk factor for testicular tumors in stallions.
- Early detection and diagnosis of abdominal masses in horses can be challenging due to their location and size.
Observation:
- Two unilateral cryptorchid stallions presented with chronic debilitating conditions and emaciation.
- Rectal examination and ultrasound revealed abdominal masses caudal to the kidneys and widespread abdominal nodules in both animals.
Findings:
- Histologic analysis confirmed intra-abdominal malignant seminoma with intraperitoneal and renal metastasis in both stallions.
- Notably, a seminoma was also identified in the descended testis of one draught horse, indicating potential bilateral or metastatic involvement.
Implications:
- This case highlights the aggressive nature and metastatic potential of intra-abdominal seminomas in stallions.
- Early diagnostic imaging and thorough examination are crucial for identifying such tumors, even in descended testes, in cryptorchid horses.
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