Malignant mesothelioma of the tunica vaginalis constitutes a very rare but often fatal malignancy of the male genitalia. This diagnosis should be suspected in patients exposed to asbestos and those presenting with clinical symptoms of either hydrocele or inguinal hernia. We report here a case of malignant mesothelioma of the tunica vaginalis. A 69-year-old man with a left hydrocele and inguinal mass was referred for left inguinal orchidectomy and hernioraphy. Histologic examination showed a malignant mesothelioma. Malignant mesothelioma of the tunica vaginalis testis is a very rare occupational neoplasm with highly aggressive biological behaviour. Treatment is difficult, and widespread local invasion and/or metastatic disease at presentation are associated with a poor prognosis.

Keywords: Malignant mesothelioma, Tunica vaginalis

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