Erosive pustular dermatosis

Skin Erosive pustular dermatosis of the scalp is a rare inflammatory disease of unknown cause that usually occurs in elderly people. It is characterized by sterile pustules, chronic crusted erosions, cicatricial alopecia, and skin atrophy [28" ]. 

Guarneri C, Vaccaro M. Erosive pustular dermatosis of the scalp following topical methyl-aminolaevulinate photodynamic therapy. J Am Acad Dermatol 2009 60(3) 521-2. 

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