. Comparison of the techniques for direct and indirect immunofluorescence. The left side depicts the direct immunofluorescent findings in cicatricial pemphigoid, a disease that has autoantibodies directed toward the basement zone. The right side shows the indirect immunofluorescent f indings for pemphigus vulgaris, a disease that has autoantibodies directed toward the intercellular areas between the spinous cells of the epithelium. Ig, Immunoglobulin; UV, ultraviolet.