Targetoid hemosiderotic hemangioma
Encyclopedia
Targetoid hemosiderotic hemangioma (also known as a "Hobnail hemangioma") is a cutaneous condition characterized by a central brown or violaceous papule
that is surrounded by an ecchymotic halo.
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 is surrounded by an ecchymotic halo.