Tunica vaginalis testis mesothelioma
Malignant mesothelioma originating from the tunica vaginalis is extremely rare.
Although the exact pathophysiology is unclear, exposure to asbestos and long-standing hydrocele are considered risk factors for malignant mesothelioma of the tunica vaginalis. A history of asbestos exposure is present in <50% of patients .
it can present as single or multiple paratesticular masses, diffuse disease, or as papillary excrescences on the inner surface of a hydrocele