Introduction: Seminoma comprises approximately 50% of testicular germ cell tumors. Renal metastases are infrequent, and are usually recognized at necropsy.
Clinical Case: A 24 years-old man with history of left radical orchiectomy due to classical seminoma (stage I), and adjuvant radiotherapy, showed elevated levels of beta-human chorionic gonadotropin and lactate dehydrogenase in the eleven month follow-up. Computed tomography showed a 9 × 8 cm lobulated, heterogeneous tumor in the left kidney. The histopathological and immunohistochemical assay demonstrated a classical metastatic seminoma.
Conclusion: The majority of renal tumors represent primary neoplasm; in patients with extra-renal tumors we must consider the possibility of a metastatic disease.
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