One of the currently effective methods for the treatment of haematological malignancies is autologous (TAUMO) or allogeneic (TALMO) hematopoietic cell transplantation (TALMO), but it is associated with a combination of factors including sepsis, graft versus host disease, and nephrotoxic drugs may result in a study of acute renal injury (AKI). Aims: to evaluate the presence of AKI in patients with lymphomas or leukemia submitted to bone marrow transplantation (BMT).