Bone Marrow or Peripheral Stem Cell Transplantation in Treating Patients With Chronic Myeloid Leukemia

DISEASE CHARACTERISTICS: Diagnosis of chronic myeloid leukemia (CML) in chronic phase No chromosomal abnormalities other than a single Philadelphia chromosome (Ph) and less than 10% blasts in bone marrow and peripheral blood OR Diagnosis of CML in accelerated phase Must meet 1 of the following criteria: More than 10% and less than 30% myeloblasts plus promyelocytes in bone marrow or peripheral blood Major perturbations of WBC, platelet count, or hematocrit uncontrolled by chemotherapy with busulfan or hydroxyurea Progressive splenomegaly Extramedullary tumor Presence of any nonconstitutional cytogenetic abnormality in addition to a single Ph chromosome Persistent unexplained fever or bone pain Ph positive OR bcr/abl positive by reverse-transcriptase polymerase chain reaction or Southern blot No CML in blast phase

PATIENT CHARACTERISTICS: Age: 15 to 65 Performance status: Not specified Life expectancy: At least 6 months based on any concurrent nonmalignant disease Hematopoietic: Not specified Hepatic: Bilirubin no greater than 2 times upper limit of normal (ULN) (unless due to CML) SGOT and SGPT no greater than 2 times ULN (unless due to CML) Renal: Creatinine no greater than 1.4 mg/dL Cardiovascular: Cardiac ejection fraction at least 45% Pulmonary: DLCO at least 50% predicted Other: HIV negative Donor Entry Criteria: HLA-identical family member No psychological, physiological, or medical condition that would preclude harvest of peripheral blood stem cells or bone marrow HIV negative Hepatitis A, B, and C antigen negative Negative pregnancy test Age 12 years and over

PRIOR CONCURRENT THERAPY: See Disease Characteristics