DISEASE CHARACTERISTICS: Histologically documented diffuse small noncleaved cell lymphoma (category J by IWF) of any stage Nodal or abdominal masses with less than 25% lymphoblasts in marrow are defined as lymphoma OR Histologically documented L3 acute lymphocytic leukemia (ALL) Greater than 25% lymphoblasts in marrow is defined as ALL, regardless of presence of bulky nodal disease Lymphoma requirements include: Documentation of lymphadenopathy, splenomegaly, or hepatomegaly, presence or absence of abdominal masses, and presence or absence of B symptoms Measurable disease other than ascites and pleural effusions, bony disease, and CNS lesions Bidimensionally measurable mass on physical exam, x-ray, or CT, or MRI OR Clearly defined hepatic mass greater than 3.5 cm on CT, MRI, or ultrasound considered to represent lymphoma OR Histologically documented hepatic lymphoma with the liver extending more than 5 cm below the costal margin on quiet respiration ALL requirements include: Documentation of monoclonal surface immunoglobulin by surface immunophenotyping Lymph node biopsy strongly recommended for patients with obvious marrow involvement Disease labeled L3 but also manifested by lymphadenopathy must be evaluated as is lymphoma (see above)