Acne necrotica
Encyclopedia
Acne necrotica present with a primary lesions that is a pruritic or painful erythematous follicular-based papule
that develops central necrosis and crusting and heals with a varioliform scar.
Papule
A papule is a circumscribed, solid elevation of skin with no visible fluid, varying in size from a pinhead to 1 cm.With regard to the quote "...varying in size from a pinhead to 1cm," depending on which text is referenced, some authors state the cutoff between a papule and a plaque as 0.5cm,...
that develops central necrosis and crusting and heals with a varioliform scar.