Methods: Our study assessed a collective mRNA expression pattern of crucial immuno-regulatory genes: BTLA, CD160, SPN, TIM-3, VISTA, TIGIT, by qRT-PCR, and performed a comparison in two different diseases, chronic lymphocytic leukemia (CLL) and psoriasis (Ps), referring to clinical characteristics. This evidence concerns the gene HAVCR2 and B-cell chronic lymphocytic leukemia.