Abstract
Spermatocytic seminoma is a relatively rare testicular tumor and is characterized by a good prognosis. The discovery of a sarcomatous contingent modifies the prognosis of the indolent neoplasm. Only 20 cases being reported in English literature. We present the case of a 66-year-old man with a two-year history of left-sided scrotal pain and swelling. Tumor markers were normal. Ultrasound demonstrated a very large solid-cystic testicular mass. Orchidectomy was performed. Further imaging investigations revealed lung, vertebra, and retroperitoneal lymph node metastases. Histological examination and immunohistochemistry of the orchidectomy specimen concluded on spermatocytic seminoma associated with undifferentiated sarcoma component.