Although Epithelial Membrane Antigen (EMA) is not a tumor marker, there is great similarity to it, for example, the relative organ specificity.

• 上皮细胞膜抗原(Epithelial membrane antigen，EMA)虽不属肿瘤标志物范畴，但与肿瘤标志物有许多相近之处，如组织的相对特异性。