Among children with some form of cancer, about a third have a type of leukemia, most commonly acute lymphoblastic leukemia. A type of leukemia is the second most common form of cancer in infants (under the age of 12 months) and the most common form of cancer in older children. Boys are somewhat more likely to develop leukemia than girls, and white American children are almost twice as likely to develop leukemia than black American children. Only about 3% cancer diagnoses among adults are for leukemias, but because cancer is much more common among adults, more than 90% of all leukemias are diagnosed in adults.
among children with some form of cancer about a third have a type of leukemia most commonly acute lymphoblastic leukemia a type of leukemia is the second most common form of cancer in infants (under the age of 12 months) and the most common form of cancer in older children boys are somewhat more likely to develop leukemia than girls and white american children are almost twice as likely to develop leukemia than black american children only about 3% cancer diagnoses among adults are for leukemias but because cancer is much more common among adults more than 90% of all leukemias are diagnosed in adults