Partial karyotypes from patients with rearrangements ofCBFA2. (A) Patient no. 1, t(17;21)(q11.2;q22); (B) patient no. 4, t(17;21)(q11.2;q22); (C) patient no. 2, t(5;21)(q13;q22); (D) patient no. 3, t(12;21)(q24;q22); (E) patient no. 5, t(15;21)(q22;q22); and (F) patient no. 6, t(14;21)(q22;q22). The abnormal homolog is on the right in every example.