Jumping translocation of 3q21 in a patient with acute myeloid leukemia and poor clinical outcome.

Jumping translocation (JT) is a cytogenetic event in which a donor chromosomal segment is translocated to two or more recipient chromosomes. We describe a case of a 75-year-old female patient diagnosed with acute myeloid leukemia (AML) with monocytic differentiation having acquired JT involving 3q21→3qter as a donor chromosomal segment with 12 different recipient chromosomes. Each abnormal clone had monosomy 7 and trisomy 8. Patients with JT have an adverse outcome, a high risk of disease progression, and an unfavorable prognosis. This is the sixth case of JT involving 3q21 and the first case having 12 different recipient chromosomes (15 chromosomal segments) along with monosomy 7 in all abnormal clones reported in the literature.