Hydrocele formation after sandwich irradiation therapy for testicular tumor.

Contralateral hydrocele formation secondary to irradiation, radical retroperitoneal lymphadenectomy, or both, in the treatment of tumor of the testis has, to our knowledge, never before been reported. Our experience with 8 patients in whom hydrocele occurred after the combined modalities of therapy prompted this report. Because these benign hydroceles cannot be differentiated from a second testicular neoplasm on the basis of symptom complex, duration, or time interval after therapy, high inguinal exploration is mandatory in every case.