"Real-life" results of front-line treatment with Imatinib in older patients (≥ 65 years) with newly diagnosed chronic myelogenous leukemia.

The age role was evaluated in 117 consecutive patients with newly diagnosed CML at our Institution treated with front-line Imatinib from 9/02 to 3/08. Forty patients (34.1%) aged ≥ 65 years and 77 (65.9%) <65 years. Thirty-four older patients (85%) had at least 1 comorbidity versus 39 younger patients (50.6%) (p<0.001). Complete cytogenetic response (CCyR) was achieved in 34/40 older patients (85%) as compared to 69/77 younger patients (89.6%), without statistically significant differences. Severe (grades 3-4 WHO) hematological and extra-hematological toxicities were more common in older patients (p=0.02 and p=0.017, respectively). Rates of permanent Imatinib discontinuation and dose reduction to 300 mg or less were significantly higher in older patients (p=0.009 and p=0.001, respectively). In conclusion, Imatinib in older patients with newly diagnosed CML seems to have the same efficacy as in younger patients, but tends to be more toxic, leading to higher rates of discontinuation and dose reduction. To overcome this problem, future trials concerning best dosage in this subset of patients could be useful.