This disease is rare, with fewer than 1 in 10,000 people being diagnosed with<unk>  during their lives. Men are four to five times more likely to develop<unk>  than women. In the United States, the annual incidence is approximately 3 cases per 1,000,000 men each year, and 0.6 cases per 1,000,000 women each year. Most patients are white males over the age of 50, although it has been diagnosed in at least one teenager. It is less common in people of African and Asian descent compared to people of European descent. It does not appear to be hereditary, although occasional familial cases that suggest a predisposition have been reported, usually showing a common Human Leukocyte Antigen (HLA) type.
Hairy cell leukemia
Chronic lymphocytic leukemia
Prolymphocytic leukemia
B-cell leukemia
T-lymphoblastic leukemia/lymphoma
T-cell leukemia
Large granular lymphocytic leukemia
Leukemoid reaction