[Circulating immune complexes in hospital patient. Results in 3650 tests (author's transl)].

The presence or absence of circulating immune complexes was investigated by the polyethylene-Clq immunodiffusion test in 3650 sera from 3000 hospital patients. Circulating immune complexes were detected in a large number of various diseases, but they were not always present, even in cases of diseases considered as caused by them. Testing for circulating immune complexes therefore is of limited clinical value and is only justified when there are hopes of finding a responsible antigen.