Day-100 cytogenetics of evaluable patients (Philadelphia and London) not receiving backup-marrow infusion (n = 13).

Responses labeled “complete,” “major,” and “none” indicate patients with 0%, 1% to fewer than 33%, and 100%, Ph⁺cells, respectively. One additional patient, not included in the Figure, had no metaphases at day 100, but subsequent FISH evaluation at 18 months after transplantation revealed approximately 40% bcr/abl⁺ cells, suggesting that a major cytogenetic response had mostly likely occurred previously.