Review of Paratesticular Appendageal Tumors, Morphology, Immunohistochemistry, and Recent Molecular Advances.

Paratesticular tumors are a rare and varied group of neoplasms arising from the tissues surrounding the testis, including the epididymis, spermatic cord, and tunica vaginalis, representing less than 10% of intrascrotal tumors. Benign tumors such as adenomatoid tumors are common, often asymptomatic but can cause discomfort. Malignant tumors, like mesothelioma and adenocarcinomas arising from appendageal structures exhibit aggressive behavior and potential for metastasis.