Acute lymphocytic leukemia (ALL): This is the most common type of leukemia in young children. ALL can also occur in adults.
Acute myelogenous leukemia (AML): AML is a common type of leukemia. It occurs in children and adults. AML is the most common type of acute leukemia in adults.
Chronic lymphocytic leukemia (CLL): With CLL, the most common chronic adult leukemia, you may feel well for years without needing treatment.
Chronic myelogenous leukemia (CML): This type of leukemia mainly affects adults. A person with CML may have few or no symptoms for months or years before entering a phase in which the leukemia cells grow more quickly.
Other types: Other, rarer types of leukemia exist, including hairy cell leukemia, myelodysplastic syndromes and myeloproliferative disorders.
Courtesy: Mayo Clinic