<prompt> Examination of a peripheral blood smear demonstrates leukemia composed of small mature lymphocytes without blast forms. Which of the following is the most likely age of this patient?1 year20 years45 years65 years  <response>: The disease described is chronic lymphocytic leukemia CLL, which is a disease of older adults. The 1 year-old choice A would be most likely to have acute lymphocytic leukemia ALL. The 45 year-old choice C would be likely to have either AML or chronic myelogenous leukemia CML. 