7th August 2020

A 14-year-old girl presents complaining of an unbearably itchy rash bilaterally on her ankles, elbows and shoulders

A 14-year-old girl presents complaining of an unbearably itchy rash bilaterally on her ankles, elbows and shoulders. On examination there is evidence of blisters and erythema. Histopathology of the skin lesion reveals granular IgA deposits at the dermal–epidermal junction. Genetic testing reveals the patient has the HLA DQ2 allele. 

For the patient above, please select the SINGLE most likely underlying diagnosis. Select ONE option from the list above.