DFS by cytogenetic risk group for 204 complete responders. The unfavorable risk group (n = 79), consisting of patients with the t(4;11), t(9;22), −7, or +8, had a median duration of nearly 10 months, whereas the miscellaneous abnormality group (n = 60) had a median of 5.5 years and the normal group (n = 65) had a median of 2.3 years.