This phase III trial compares the effect of high dose chemotherapy and the patients' own (autologous) stem cells to observation only in patients with peripheral T-cell lymphoma who achieved a complete response after initial chemotherapy. Usual treatment after a complete response may include observation or high dose chemotherapy followed by an autologous stem cell transplant, however, it is not known if a transplant if beneficial. Giving chemotherapy before a stem cell transplant helps kill cancer cells in the body and helps make room in the patient's bone marrow for new blood-forming cells (stem cells) to grow. Stem cells removed prior to treatment are then returned to the patient to replace the blood forming cells that were destroyed by the chemotherapy. Giving high dose chemotherapy followed by an autologous stem cell transplant may be more effective compared to observation only in treating patients with peripheral T-cell lymphoma who have achieved a complete response after initial chemotherapy.
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Progression-free survival (PFS)
Timeframe: From study randomization to documented disease progression or death, whichever occurs first, assessed up to 12 years