[26 year-old male patient with bone marrow transplantation. Report of a partial autopsy].

26 year-old male patient with diagnosis of acute lymphoblastic leukemia in 2006, who underwent chemotherapy and suffered a relapse and pulmonary aspergillosis as a complication. In 2009, he received bone marrow transplant. After it, he developed cutaneous and intestinal graft versus host disease (GVH). He was admitted for diarrhea. Then he presented grade IV dyspnea, patchy alveolar infiltrates on chest computed tomography and pancytopenia with impaired renal function as laboratory findings. He entered Intensive Care Unit, dying 7 days later. The oncologist who discussed the case defined this patient as a high risk case because of type of transplant received, relapse and complications. His diagnostic hypotheses were: CMV infection, pulmonary aspergillosis reactivation, chronic GVH, Pneumocystis jiroveci infection, mycobacteriosis and pseudomembranous colitis. Partial autopsy revealed diffuse intra-alveolar hemorrhage, diffuse alveolar damage, right pulmonary infarction with microthrombosis and bronchiolitis obliterans organizing pneumonia.