A 50-year-old male known case of myasthenia with erythema shallow erosions with few blisters and scales. Oral mucosa is not involved immunopathology demonstrates IgG deposition on keratinocytes and autoantibodies against Dsg – 1. The diagnosis is –

In this question :- Association with mysthenia gravis Shallow erosions with few blisters No involvement of oral mucosa IgG against desmoglein 1 All suggests pemphigous foliaceous :- All suggests pemphigous foliaceous:- i)    P. foliaceous is the most common variant of pemphigus which is associated with paraneoplastic pemphigus (eg. thymoma with mysthenia gravis)