title: An unusual difficulty in blood grouping due to soluble group substance in a patient's serum.
mesh_terms: D001789:Blood Group Antigens; D003537:Cystadenoma / Q000150:complications*; D005260:Female; D006801:Humans; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000150:complications*
chemical_list: D001789:Blood Group Antigens