Abstract
Immunofluorescence, especially direct immunofluorescence of skin, has been widely used for diagnosis of connective tissue diseases. It is principally of value for LE and may be used also as a prognostic test for SLE. It is of relatively little value for diagnosis of other connective tissue diseases and appears not to predict the outcome of undifferentiated connective tissue disease. Cutaneous immunofluorescence is widely available and has an established place in the field of dermatopathology. As with other microscopic interpretations, substantial experience, along with an understanding of basic immunopathologic principles, is necessary for reliable results. Antibodies to certain ultrastructural components of the basement membrane zone are now available. These are being evaluated for further diagnostic applications to LE and other diseases that involve the epidermal basement membrane zone.
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