Peer-reviewed veterinary case report
Stallion, 12, has growing testis mass - what could it be?
By Roxon, Caroline et al.·Published in Journal of equine veterinary science·2023·Department of Clinical Studies (Roxon, United States·View original on PubMed →
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Original publication title: Multiple Sex Cord-stromal Tumors in a Standardbred Stallion Testis.
- Species:
- horse
Plain-English summary
A 12-year-old Standardbred stallion was brought in because of a growing mass in his left testicle and a noticeable decrease in its size over the past five months. An ultrasound showed a firm mass and two smaller areas in the left testis, raising concerns about cancer. The veterinarian decided to remove the affected testicle to prevent any aggressive tumor growth. After surgery, the larger mass was identified as a Sertoli cell tumor, while the smaller ones were mixed tumors with different cell types. This case is significant as it’s the first known instance of these tumors occurring together in a horse's testis.
People also search for: stallion testicular tumor · Sertoli cell tumor in horses · horse testicle surgery recovery
Abstract
A 12-year-old Standardbred stallion presented with a 5-month history of a growing mass in the left testis as well as an overall decrease in left testicular size. Palpation and ultrasonography of the left testis revealed a firm, hypoechoic, clearly delineated soft tissue mass in the craniolateral portion of the testis that measured 2.5 × 2.3 × 1.9 cm. Two smaller, hypoechoic regions also were visible ultrasonographically in the left testis, suggesting the presence of multifocal/multicentric neoplasia. The affected testis was very small (testicular volume of 40.3 cm). The right testis was significantly larger (144.3 cm), and the parenchyma was ultrasonographically normal. Due to the concern that these findings could indicate the presence of a more aggressive tumor type, unilateral orchiectomy was performed. Multiple soft tissue masses were identified grossly, and histopathologic evaluation identified the larger mass as a Sertoli cell tumor and the two smaller masses as mixed sex cord-stromal tumors with Sertoli cell and Leydig cell differentiation. To our knowledge, this the first report of concurrent Sertoli cell and mixed sex cord-stromal tumors in a single descended equine testis.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/36775076/