Peer-reviewed veterinary case report
Bilateral testicular mixed germ cell-sex cord-stromal tumours in a stallion.
- Journal:
- Reproduction in domestic animals = Zuchthygiene
- Year:
- 2009
- Authors:
- Brito, L F C et al.
- Affiliation:
- Department of Clinical Studies · United States
- Species:
- horse
Plain-English summary
An 18-year-old Friesian stallion was seen by a veterinarian about a week after he had swelling in his scrotum, which was thought to be caused by twisting of the spermatic cords. When he was examined, the swelling was gone, and the testes were in their normal position, but they were smaller than expected and felt lumpy. An ultrasound showed unusual areas in the testes, and further tests revealed that he had rare tumors in both testes. This case is significant because it is the first documented instance of this type of tumor in a stallion, and it suggests that certain ultrasound features can help identify testicular tumors. The treatment details and outcome were not provided in the abstract.
Abstract
An 18-year-old Friesian stallion was examined approximately one week after reportedly presenting scrotal swelling due to torsion of the spermatic cords. Upon presentation no scrotal swelling was noted, the testes were normally oriented, and no abnormalities of the spermatic cords were noted. However, both testes were smaller than expected for a mature stallion and deep palpation revealed that the consistency of the testes was nodular. Ultrasonographic evaluation of the testes revealed diffuse heterogeneous parenchyma with multiple hypoechoic nodular areas. Grossly, the testicular parenchyma was effaced by multiple gray-tan nodules of varying consistency interspersed with gray-white bands of tissue. Microscopic analysis revealed multiple pleomorphic neoplastic foci disseminated throughout both testes. Histological and immunohistochemical features were atypical and consistent with the diagnosis of bilateral testicular mixed germ cell-sex cord stromal tumours. Bilateral testicular tumours and testicular mixed cell tumours are extremely rare in stallions and this is the first report of bilateral testicular mixed germ cell-sex cord-stromal tumours in a stallion. Our findings indicate that certain ultrasonographic characteristics are suggestive of testicular tumour and that immunohistochemistry markers can be used to better characterize testicular neoplasms in stallions.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/19019072/