SDC1 and acute lymphoblastic leukemia: Expression of syndecan-1 on leukocytes was higher in AML than ALL patients, as syndecan-1 was expressed on leukocytes at a median of 30.35 ng/ml (range, 18.35-163.35 ng/ml) in AML cases, and 29.85 ng/ml (range, 17.35-82.85 ng/ml) in ALL cases.