Serial quantitation of TRECs in 2 selected patients.

Serial quantitation of TRECs in peripheral blood lymphocytes in 2 patients (●, patient 7; ○, patient 3) who underwent allogeneic BMT followed by infusion of CD4⁺ lymphocytes from the same donor for treatment of leukemia relapse. Times of cytogenetic relapse, CD4⁺ DLI, and cytogenetic remission are indicated by arrows.