In samples from ET patients with JAK2 mutations, we focused on the analysis of 13 genes (ARG1, CAST, CD177, CLEC5A, DAPP1, EPS15, IGHM, IL18RAP, OLFM4, OLR1, RIOK3, SELP, and THBS1). Here, CD177 is linked to essential thrombocythemia.