High-Dose Chemotherapy Given Together With Peripheral Blood Stem Cell Transplant in Treating Patients With Intestinal T-Cell Lymphoma

RATIONALE: Giving chemotherapy before a peripheral blood stem cell transplant stops the growth of cancer cells by stopping them from dividing or by killing them. After treatment, stem cells are collected from the patient’s blood and stored. More chemotherapy is given to prepare the bone marrow for the stem cell transplant. The stem cells are then returned to the patient to replace the blood-forming cells that were destroyed by the chemotherapy.
PURPOSE: This phase II trial is studying high-dose chemotherapy given together with peripheral blood stem cell transplant in treating patients with intestinal T-cell lymphoma.