Imaging of Radiolabeled White Blood Cells in Patients With Non-Hodgkin’s Lymphoma

RATIONALE: Measuring the number of radiolabeled white blood cells in non-Hodgkin’s lymphoma tumors may help doctors predict how well patients will respond to treatment, and may help the study of cancer in the future. PURPOSE: This study is measuring radiolabeled white blood cells in patients with non-Hodgkin’s lymphoma.