• Diagnosis of MCL (Stage II, III or IV) as evidenced by lymph node histology and either expression of cyclin D1 (in association with CD20 and CD5) or evidence of t(11;14) translocation, such as by cytogenetics, fluorescent in situ hybridization (FISH) or polymerase chain reaction (PCR). Patients with a diagnosis of Stage I MCL will not be permitted to enter study.