title: [Diagnostic difficulties in renal cancer (2 cases of clear-cell carcinoma)].
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis*; D000368:Aged; D001416:Back Pain / Q000209:etiology; D003937:Diagnosis, Differential; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis*; D008159:Lumbar Vertebrae; D008297:Male; D008875:Middle Aged; D013125:Spinal Neoplasms / Q000175:diagnosis / Q000556:secondary
vernacular_title: Trudności rozpoznawcze rakóm nerek (dwa przypadki raka jasnokomórkowego).