Sandbox: epi

• Hairy cell leukemia is considered one of the least common types of leukemias in the United States.
• The incidence of hairy cell leukemia is approximately 3.2 per 1,000,000 individuals in the United States.
• For the past 30 years, the incidence of hairy cell leukemia has been relatively constant
• Males are more commonly affected with hairy cell leukemia than females. The male to female ratio is approximately 4 to 1.
• Hairy cell leukemia usually affects individuals of the Caucasian race. Asian and African American individuals are less likely to develop hairy cell leukemia.
• The incidence of hairy cell leukemia increases with age; the median age at diagnosis is 58 years.