Imatinib mesylate efficacy in 72 previously treated Philadelphia-positive chronic myeloid leukemia patients with and without additional chromosomal changes: single-center results.
Reported here are 72 previously treated Philadelphia chromosome-positive (Ph+) CML patients on imatinib (IM) therapy, with a focus on patients with additional chromosomal aberrations (CAs). At the start of IM treatment, 49 patients exhibited only the Ph chromosome (68%) and 23 patients (32%) had one or more additional CAs. The most frequent additional changes were deletions on the der(9q) (8 of 23), trisomy 8 (3 of 23), and an extra copy of the Ph chromosome (2 of 23). Five patients had a complex karyotype. At the latest follow-up, 49 of the 72 patients (68%) were alive, including 15 of the 23 patients with additional CAs (65%). Median follow-up was 6.6 years; median duration of IM treatment was 4.4 years. In all, 35 of the 49 patients with Ph only (71%) and 10 of the 23 patients with additional CAs (43%) achieved complete cytogenetic response. All patients with deletion on der(9q) achieved complete cytogenetic response. There was no statistically significant difference in the overall survival of patients with additional CAs and patients with Ph as the sole abnormality. Patients in accelerated phase had significantly worse overall survival on IM, regardless of additional CAs. The present results confirm that the majority of previously treated Ph+ CML patients benefit from starting IM therapy, including patients with defined additional changes. In contrast, patients with complex karyotypes have poor prognosis, even with IM.
Holzerová
Milena
M
Department of Hemato-Oncology, University Hospital, Olomouc, Czech Republic.
Faber
Edgar
E
Veselovská
Jitka
J
Urbánková
Helena
H
Balcárková
Jana
J
Rozmanová
Sárka
S
Voglová
Jaroslava
J
Muzík
Jan
J
Chroust
Karel
K
Indrák
Karel
K
Jarosová
Marie
M
D000293:Adolescent; D000328:Adult; D000368:Aged; D001549:Benzamides; D002869:Chromosome Aberrations; D015331:Cohort Studies; D019008:Drug Resistance, Neoplasm; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D000068877:Imatinib Mesylate; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000175:diagnosis / Q000188:drug therapy* / Q000235:genetics; D008297:Male; D008875:Middle Aged; D010879:Piperazines / Q000627:therapeutic use*; D011743:Pyrimidines / Q000627:therapeutic use*; D016019:Survival Analysis; D016896:Treatment Outcome
D001549:Benzamides; D010879:Piperazines; D011743:Pyrimidines; D000068877:Imatinib Mesylate