[Anti-U antibodies in autoimmune hemolytic anemia]

The results of serological investigations in 23 patients with autoimmunohaemolyts anaemia (AIHA) and warm-type autoantibodies belonging to IgG immunoglobulins are presented. The serological specificity of autoantibodies was demonstrated in 8 cases, and in 4 of them specificity to single antigen of the Rh system was demonstrated, in the remaining 4 cases they were specific against U antigen. The method of identification of these autoantibodies and their characteristic features are described. Analysing the clinical course of AIHA in three cases with anti-U autoantibodies it was stated that was chronic, intermittently recurring and was not associated with proliferative disorders of the haematopoietic system.