 Overall results in the treatment of middle aged adults acute myelogenous leukemia AML are substantially improved in the last decade, with complete remission CR rates established to values of 70 to 80per cent and also encouraging long-term outcome, especially in patients who can tolerate intensified post remissional treatment strategies. On the contrary, there has been little progress in the treatment of older patients. In these patients the response rate generally range between 40 and 60per cent, and overall survival at 2 years is often less than 10 per cent. 