title: Lack of HLA (A, B and C) antigen expression on the cell surface of trophoblastic tumors (hydatidiform moles and choriocarcinoma).
mesh_terms: D000954:Antigens, Surface / Q000235:genetics*; D002822:Choriocarcinoma / Q000235:genetics; D005260:Female; D005455:Fluorescent Antibody Technique; D005786:Gene Expression Regulation; D006680:HLA Antigens / Q000235:genetics*; D006801:Humans; D006828:Hydatidiform Mole / Q000235:genetics; D011247:Pregnancy; D014328:Trophoblastic Neoplasms / Q000235:genetics*; D014594:Uterine Neoplasms / Q000235:genetics*
chemical_list: D000954:Antigens, Surface; D006680:HLA Antigens