[Non-Hodgkin's lymphoma and urinary tract. About a case reported].

We pass to describe a case of non Hodgkin's secondary lymphoma with metachronic affectation in bladder and left kidney, in a patient with different extranodals locations. Both in bladder and kidney, it was a low grade lymphoma type B with centrofolicular cells. We suggest haematogenous dissemination and affinity of lymphomatous clone to the urinary tract. We establish some diagnostic considerations, such about the therapeutic management in this type of pathologies.