可溶性细胞粘附分子来自细胞表面粘附分子的脱落或由细胞直接分泌，可存在于外周血及多种体液中。已发现在肿瘤及某些感染性疾病中该因子水平有所增高并与病情存在一定的相关关系。 Soluble cell adhesion molecules from the cell surface adhesion molecules shed or directly secreted by the cells can exist in peripheral blood and a variety of body fluids. It has been found in cancer and certain infectious diseases, the level of the factor has increased and has a certain correlation with the disease.