As for other B-CLPD subtypes, Sidorenko et al. (1992), using the IPO-3 antibody, detected reactivity in a number of Burkitt lymphoma (BL) cell lines as well as in 2 out of 30 samples from CLL patients and 4 out of 7 samples from patients with hairy cell leukemia (HCL) [40]. This evidence concerns the gene SLAMF1 and hairy cell leukemia.