CD34 and cancer: CD164, also known as endolyn or MGC‐24v, is a member of sialomucin family, which is conversed and encoded by CD164 gene located on human chromosome 6q21.7, 8 CD164 was first identified in primitive CD34+ hemopoietic progenitor cells and bone marrow stromal cells and has been found to be involved in proliferation, migration, and adhesion of these cells.9, 10, 11 By facilitating the adhesion and migration of human CD34+ cells to bone marrow stroma, CD164 was proposed to regulate hematopoiesis.12 In human cancers, CD164 was reported played roles in many different cancers.