Skin biopsies of this rash reveal keratinocyte acantholysis. Image description: (A) Erythematous papules and plaques with scale involving the face, scalp, neck, and trunk. The scale characteristically has a “cornflake-like” quality and colour.

(B) Perilesional biopsy sample for direct immunofluorescence showing IgG deposition in a net-like pattern within the epidermis. What is the most likely diagnosis? Source: TheLancet *This case is from Docplexus editorial team for educative purpose only