title: [Renal metastasis of classic seminoma].
abstract: BACKGROUND
  Seminoma comprises approximately 50% of testicular germ cell tumors. Renal metastases are infrequent, and are usually recognized at necropsy.
  
  
  METHODS
  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.
  
  
  CONCLUSIONS
  The majority of renal tumors represent primary neoplasm; in patients with extra-renal tumors we must consider the possibility of a metastatic disease.
authors.affiliation: Departamento de Anatomía Patológica, Hospital de Especialidades No. 25. Centro Médico Nacional del Noreste. Instituto Mexicano del Seguro Social, Monterrey, México. a.patologica_imss_mty@yahoo.com
authors.forename: Edmundo Erbey
authors.initials: EE
authors.lastname: Castelán-Maldonado
authors.forename: César Iván
authors.initials: CI
authors.lastname: Peña-Ruelas
authors.forename: César Valentín
authors.initials: CV
authors.lastname: Ignacio-Morales
authors.forename: Sarah Aracely
authors.initials: SA
authors.lastname: Romero-Martínez
authors.forename: Paul Constantino
authors.initials: PC
authors.lastname: Sánchez-Arbea
mesh_terms: D058186:Acute Kidney Injury / Q000209:etiology; D003131:Combined Modality Therapy; D003937:Diagnosis, Differential; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D008297:Male; D009392:Nephrectomy; D009919:Orchiectomy; D011183:Postoperative Complications / Q000209:etiology; D018714:Radiotherapy, Adjuvant; D018239:Seminoma / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D013736:Testicular Neoplasms / Q000532:radiotherapy / Q000601:surgery*; D055815:Young Adult