Mammary fibroepithelial hyperplasia in a male cat
Bonatto, Giovanna LapkoskiSilva, Victoria Gariba eFavero, Lucas JocemirKano, Natália NoreikaSousa, Renato Silva deAlbernaz, Vinicius Gonzalez Peres
Background: Feline mammary hyperplasia (FMH) is a benign disease that commonly affects young females, once it iscaused by the exaggerated stimulation of endogenous or exogenous progestogen. FMH leads to acute edema and inflammation of the mammary glands and frequently evolve to ulcerations, secondary infections, and systemic clinical signs.Even though it is rare in male cats, progesterone therapy or an unknown endogenous source of hormone can cause thedisease. This report aims to describe a case of FMH in a male feline with no history of hormonal treatment and treatedwith radical surgical resection.Case: A 7-month-old intact male domestic shorthair cat was presented due to acute onset of generalized mammary tumorswhich had progressed for 18 days. Tumors size had 5 cm large in diameter, symmetric, bilateral, and affected all mammaryglands. The tissue was firm, hyperemic, and ulcerated. FMH was initially suspected but with a differential diagnosis formammary adenocarcinoma. Except for pain on tumor palpation, there was no other clinical abnormality. Survey thoracicradiographs and abdominal ultrasound did not find signs of metastasis or hermaphroditism. Fine-needle aspirate biopsy andfurther cytological examination were inconclusive. Surgical resection through a single-stage bilateral total mastectomy andreconstruction using a left flank fold flap was elected. There were no intraoperative complications and the cat recoveredwell, with good healing and no clinical signs 21 days after the surgery. Histological examination of the mammary glandsconfirmed the diagnosis of FMH due to the non-neoplastic characteristics and tissues benign biological behavior. Elevenmonths after diagnosis, the cat was asymptomatic.Discussion: The FMH frequently affects young females and is associated with gestational periods, the end of the estrouscycle, and, most commonly, hormonal therapy with synthetic progesterone. Male cats are rarely affected with or...(AU)
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