Karyotype is an independent prognostic parameter in therapy-related acute myeloid leukemia (t-AML): an analysis of 93 patients with t-AML in comparison to 1091 patients with de novo AML.
The aim of this study was to compare the pattern of karyotype abnormalities of therapy-related acute myeloid leukemia (t-AML) (n=93) with de novo AML (n=1091), and to evaluate their impact on prognosis. Favorable, intermediate, and unfavorable cytogenetics were observed in 25.8, 28.0, and 46.2% of t-AML, and in 22.2, 57.3, and 20.4% of de novo AML. The median overall survival (OS) was shorter in t-AML than in de novo AML (10 vs 15 months, P=0.0007). Favorable and unfavorable cytogenetics had a prognostic impact with respect to OS in both t-AML (P=0.001 and 0.0001) and de novo AML (P<0.0001 and <0.0001). To define the overall prognostic impact of cytogenetics and t-AML, a multivariate Cox's regression analysis was performed for OS with favorable cytogenetics, unfavorable cytogenetics, t-AML, age, and white blood cell (WBC) count as covariates. All parameters proved to be independently related to OS (P=0.001 for t-AML, P<0.0001 for all other parameters). Within patients with t-AML, there were significant correlations between OS and both unfavorable (P<0.0001) and favorable cytogenetics (P=0.001), while age and WBC count had no impact on OS. In conclusion, these data indicate that cytogenetics are an important prognostic parameter in t-AML. Furthermore, t-AML is an unfavorable factor independent of cytogenetics with respect to survival.
Schoch
C
C
Department of Internal Medicine III, University Hospital Grosshadern, Ludwig-Maximilians University, Munich, Germany. claudia.schoch@med3.med.uni-muenchen.de
Kern
W
W
Schnittger
S
S
Hiddemann
W
W
Haferlach
T
T
D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D002869:Chromosome Aberrations; D002877:Chromosomes, Human / Q000235:genetics; D005260:Female; D006801:Humans; D007621:Karyotyping; D007951:Leukemia, Myeloid / Q000145:classification* / Q000235:genetics* / Q000628:therapy; D008297:Male; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000235:genetics* / Q000473:pathology; D011379:Prognosis; D012074:Remission Induction; D015996:Survival Rate; D014178:Translocation, Genetic