HL-A antigen frequency distribution in patients with gestational choriocarcinoma and their husbands.

HL-A (A,B,C, and DR) antigen frequency distribution was determined in 29 patients with choriocarcinoma and in their husbands, as well as in a matched control population of 21 healthy couples. All 29 patients had achieved complete sustained remission with chemotherapy. The HL-A antigen frequency distribution was normal in the choriocarcinoma patients and in their husbands and there was no abnormal HL-A antigen sharing between patients and their husbands. This study does not exclude the possibility that the pathogenesis of resistant choriocarcinoma may be dependent upon tumour-host histocompatibility.