Autologous bone marrow transplantation (AuBMT) is an accepted treatment modality for patients with high-risk or relapsed hematological malignancies. Hepatotoxicity, in particular veno-occlusive disease (VOD), is a significant complication of this therapy. The purpose of this study was to determine the clinical relevance of abnormal liver function in the patients who received high-dose cytotoxic therapy and AuBMT for hematological malignancies at Memorial Sloan Kettering Cancer Center. Medical records of 180 consecutive patients between 1984 and 1991 treated with cytotoxic chemotherapy and AuBMT for acute myelogenous leukemia, non-Hodgkin's lymphoma, and Hodgkin's disease were reviewed. Forty-six patients (26%) developed jaundice with bilirubin > 4 mg/dl. These patients had a 43% toxic death rate compared to an 11% toxic death rate in patients with lower bilirubins (p < 0.001). The main etiology of hyperbilirubinemia was VOD of the liver noted in 22 of the 180 patients (12%). Other etiologies of jaundice included hepatitis, sepsis with multiorgan dysfunction, cholecystitis, and recurrent disease. Hyperbilirubinemia of various etiologies is a significant complication of AuBMT. Several new strategies are under investigation to decrease the toxicity of intensive therapy.