Which of the following is most commonly seen in the population older than70 years?
a. Chronic lymphocytic leukemia
b. Chronic myelogenous leukemia
c. Essential thrombocytosis
d. Acute lymphocytic leukemia
ANS: A
Chronic lymphocytic leukemia is the most common leukemia in the population older than 70 years of age, although acute myeloid leukemia and chronic myelogenous leukemia do show increased age-related incidence. Essential thrombocytosis is rare. Chronic myelogenous leukemia is seen more often in the middle aged, and acute lymphocytic leukemia most commonly occurs in children.
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