What are labs for pemphigus?

• Histopathology • Direct immunofluorescence (DIF) on normalappearing perilesional skin • Indirect immunofluorescence (IDIF) using the patient's serum if DIF results are positive Histology: • Histopathology from the edge of a blister: • Basal cells are separated from one another and stand like a row of tombstones on the floor of the blister, but they remain attached to the basement membrane Eosinophilic spongiosis in some patients