IgA deposits in dermal papilla are characteristically seen in?
High-Yield Explanation
A. Dermatitits herpetiformisDermatitits 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.