The Great Imitator: A Case of Multisystem Sarcoidosis Involving the Genitourinary System.

Sarcoidosis is a multisystem noncaseating granulomatous disease, which primarily involves the lungs, skin, and lymph nodes. In this case, we describe a 49-year-old Caucasian male presenting with weakness and symptomatic hypercalcemia. Initial workup revealed multiple testicular hypoechoic lesions on ultrasound and pulmonary nodules with hilar lymphadenopathy on a CT scan. Given the age of the patient, the initial differential diagnosis included lymphoma and testicular cancer. However, a lymph node biopsy confirmed the presence of noncaseating granulomas, and thus a diagnosis of multisystem sarcoidosis was made. Treatment with systemic steroids resulted in significant improvement, and he was initiated on methotrexate as a steroid-sparing agent. This case report details an unusual presentation of this multisystemic disease, which infrequently involves the genitourinary system, and presents a review of the literature on the "great imitator."