Malignant Mesothelioma of the Testes with Retroperitoneal Recurrence and Resection in an 80-Year-Old Male and Review of the Literature.

Malignant mesothelioma of the testes is an aggressive, yet rare urogenital malignancy, accounting for an infinitesimally small number of oncologic diagnoses. This infrequent occurrence is accompanied by a relative lack of knowledge surrounding this disease, thus limiting management options beyond surgical intervention. Oftentimes, these malignancies present with a poor prognosis despite early intervention and only worsen in the event of metastatic spread with poor survival and limited response to treatment, if any. Our case documents positive patient outcomes following the use of aggressive surgical intervention in the management of a metastatic testicular mesothelioma. A healthy 80-year-old male with sudden painless testicular swelling requiring radical orchidectomy following failed initial conservative management. Pathologically, the specimen was diagnosed as malignant mesothelioma of the right testis with involvement of the tunica albuginea and tunica vaginalis. Following disease recurrence at 82 years of age, the patient subsequently opted for an open right-sided template non-nerve sparing retroperitoneal lymph node dissection which was undertaken without complication. Malignant mesothelioma of the testes remains an ominous diagnosis with historically poor outcomes and for which surgical intervention remains the mainstay of treatment. The retroperitoneal lymphatic drainage represents the most common route of metastatic spread for testicular tumours; however, retroperitoneal lymph node dissection has rarely been employed in this patient population and never in an individual of this age. Our findings contribute to the growing literature surrounding these rare malignancies and outline the importance of considering both patient autonomy and the clinical picture in disease management.