Resumo

STOISA, Daniela et al. Papillary cystadenoma of the epididymis: a case report. Rev. argent. radiol. [online]. 2012, vol.76, n.4, pp.319-324. ISSN 1852-9992.

We report a case of papillary cystadenoma of the epididymis (PCE) in a 44-year-old male patient with a palpable right intrascrotal mass. Ultrasound and magnetic resonance imaging showed three extratesticular intraepididymal thick wall-cystic lesions measuring 1.0 x 0.4 cm overall. After surgical resection, the pathological diagnosis was papillary cystadenoma of epididymis. This is a rare benign epithelial tumor that arises from the efferent duct epithelium. It usually occurs in young adult males and it may be unilateral or bilateral (one third of cases) as well as sporadic or hereditary related to von Hippel-Lindau disease (especially bilateral lesions). The diagnosis is made by physical examination and diagnostic imaging (ultrasound and magnetic resonance imaging). Histologically, it is characterized by cystic spaces with internal papillary projections lined by clear cells similar to those of renal cell carcinoma (RCC). Differentiation between papillary cystadenoma of the epididymis and renal cell carcinoma is made by immunohisto-chemical markers. Treatment consists in surgical excision and subsequent follow-up, since, and although, its excellent prognosis, malignant transformation have been reported.

Palavras-chave : Cystadenoma papillary; Von Hippel-Lindau disease; Epididymis.

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