AIIMS November 2011 – MCQ 28

IgA deposits in dermal papilla are characteristically seen in?
A. Dermatitits herpetiformis
B. Pemphigus vulgaris
C. Bullous pemphigoid
D. IgA dermatosis of childhood

Correct answer : A. Dermatitits herpetiformis

Dermatitits herpetiformis is diagnosed by a blood test for IgA antibodies, and by a skin biopsy in which the pattern of IgA deposits in the dermal papillae, revealed by direct immunofluorescence, distinguishes it from linear IgA bullous dermatosis and other forms of dermatitis.