Kievitsbosch, ThatianePrestes, Nereu Carlos [UNESP]Fabris, Viciany EriqueScagion Salgado, Luíz FernandoAlvarenga, Marco Antonio [UNESP]2014-05-272014-05-272013-03-15Journal of Equine Veterinary Science.0737-0806http://hdl.handle.net/11449/74833A 5-year-old Mangalarga mare was referred to the Veterinary Teaching Hospital of the Veterinary Medical School in Botucatu with a complaint of a persistent 2-month ovarian follicle which had grown progressively to 20 cm in diameter. Ultrasonography showed a circular, cystic structure in the right ovary, whose wall was thickened and interior was filled with anechoic content. Ovarian neoplasia was suspected, and a unilateral ovariectomy was performed through the paralumbar fossa, using general anesthesia through inhalation. Histopathological evaluation concluded that the ovarian enlargement was caused by a fibrothecoma. The present report describes features of fibrothecoma, which is extremely rare in the equine species. © 2013 Elsevier Inc. All rights reserved.engFibrothecomaHistopathologyMareOvarian tumorOvariectomyArtigo10.1016/j.jevs.2012.12.011WOS:000326254100008Acesso restrito2-s2.0-8487479917359464821100816870473846154288947