Balanced chromosome abnormalities inv(16) and t(15;17) in therapy-related myelodysplastic syndromes and acute leukemia: report from an international workshop
Abstract
The Workshop identified 48 unselected patients with therapy-related myelodysplastic syndrome or acute myeloid leukemia (t-MDS/t-AML) and inv(16), and 41 patients with t(15;17) after chemotherapy (CT) and/or radiotherapy (RT) for a malignant or nonmalignant disease. The primary diseases were: breast cancer, 33 patients; lymphomas, 24 patients; various other solid tumors, 30 patients; and nonmalignant diseases, 2 patients. The general type of previous therapy was RT only in 10 patients with an inv(16) and in 12 patients with a t(15;17), alkylating agents plus topoisomerase II inhibitors in 24 patients with an inv(16) and in 18 patients with a t(15;17), topoisomerase II inhibitors only in 5 patients with an inv(16) and in 2 patients with a t(15;17), alkylating agents only in 6 patients in each subgroup, and other types of chemotherapy in 3 patients in each subgroup. Most CT-treated patients (69%) also received RT. The latency period to development of t-MDS/t-AML was short: a median of 22 months in patients with inv(16) and 29 months in patients with t(15;17). Twenty-six patients (54%) with an inv(16) and 17 patients (41%) with a t(15;17) had additional cytogenetic abnormalities, which were unrelated to age and survival in both sub...Continue Reading
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