Immunofluorescence studies in herpes gestationis.

In 4 cases of H.G., direct junctional immunofluorescence findings showed an intense band of C3 present in the involved skin of the patients even after the active lesions had disappeard (i.e. 2 months later). Weak specific fluorescence for IgG and in one case also for IgA and IgM was seen in the involved skin. A less intense junctional band of C3 was also present in the uninvolved skin. Antibodies against basal membrane have not been detected in the sera of the patients.