ENPP3 and systemic mastocytosis: Other markers that can be found on neoplastic MCs are CD123, an α subunit of interleukin-3 receptors; adhesion molecules, such as CD11b, CD11c, CD18, CD22, CD49e, CD51, and CD54; complement-related CD55 and CD88; FcγRIIIB (CD16) and FcγRI (CD64) receptors [81]; and CD203c over-expressed on neoplastic MCs from SM patients.