Bilateral Leydig Cell Tumor in Stallion

Melo, C.M.; Papa, F.O.; Prestes, N.C.; Alvarenga, M.A.; Laufer-Amorim, R.

doi:10.1016/j.jevs.2007.08.002

« Previous Next »Journal of Equine Veterinary Science
Volume 27, Issue 10 , Pages 450-453, October 2007

Bilateral Leydig Cell Tumor in Stallion

C.M. Melo, MS
- Department of Animal Reproduction and Veterinary Radiology—UNESP/São Paulo State University, São Paulo, Brazil
- Reprint requests: C. M. Melo, FMVZ—Department of Animal Reproduction and Veterinary Radiology, Distrito de Rubião Júnior s/n°, 18618-000, Botucatu, SP, Brazil.
F.O. Papa, PhD
- Department of Animal Reproduction and Veterinary Radiology—UNESP/São Paulo State University, São Paulo, Brazil
N.C. Prestes, PhD
- Department of Animal Reproduction and Veterinary Radiology—UNESP/São Paulo State University, São Paulo, Brazil
M.A. Alvarenga, PhD
- Department of Animal Reproduction and Veterinary Radiology—UNESP/São Paulo State University, São Paulo, Brazil
R. Laufer-Amorim, PhD
- Department of Veterinary Clinic—UNESP/São Paulo State University, São Paulo, Brazil

Abstract

The authors report a rare case of bilateral Leydig cell tumor in a noncryptorchid stallion, describing the gross and microscopic findings. An 8-year-old Appaloosa stallion was examined for a unilateral enlargement of the testis associated with discomfort during palpation and signs of colic. General health conditions were good. Fine-needle aspiration cytology of the testis provided the diagnosis of bilateral Leydig cell tumor. Bilateral orchiectomy was performed and the testes were submitted to histopathologic examination that confirmed the diagnosis of Leydig cell tumor.

Keywords: Testis, Interstitial cell tumor, Stallion