PTGER4 and myeloid sarcoma: Regarding SNPs associated with Ptger4 plasma levels in our analysis, intronic variants rs17044638, located on the SATB1 gene, and rs3791268, located on the MGAT5 gene, resulted each associated with respective gene expression [81]; Ptger4 biological function is correlated with both SATB1 and MGAT5 protein products, i.e., Satb1 and Mgat5, as all these proteins have been linked to MS risk due to the role played in T cell differentiation, proliferation, and activation [82,83,84,85,86,87].