[A case of epididymal sarcoidosis].

We reported a case of epididymal sarcoidosis. The patient was a 13-year-old boy with a chief complaint of right scrotal mass. On physical examination, a firm, nontender 7 mm mass was palpable in the right hemiscrotum and appeared to involve the head of the epididymis. Ultrasonography showed a highly echogenic mass in the epididymis. A routine chest X-ray revealed lymphadenopathy of the mediastinum and reticular shadows in bilateral lung fields. Because the lesion might be confined to the epididymis, a partial epididymectomy was performed. The histopathologic specimen showed noncaseating granulomas consistent with sarcoidosis. Lung biopsies also revealed noncaseating granulomas. Subsequent pulmonary function studies revealed a mild obstructing ventiratory defect, therefore therapy was instituted with systemic steroids. There were no further recurrent scrotal masses. Although sarcoidosis is known to affect many organs, involvement of the genital system is relatively rare. Most of the patients with intrascrotal sarcoid lesions have an abnormal chest X-ray. We need to differentiate these lesions from advanced testicular cancer. This is the 5th case of intrascrotal sarcoidosis in Japanese literature.