The Diagnosis: Diffuse Dermal Angiomatosis Diffuse dermal angiomatosis (DDA) is an acquired reactive vascular proliferation in the spectrum of cutaneous reactive angioendotheliomatoses. Clinically, DDA presents as violaceous reticulated plaques, often with secondary ulceration and sometimes necrosis.1-3 Diffuse dermal angiomatosis more commonly presents in patients with a history of severe peripheral vascular disease, coagulopathies, or infection, and it frequently arises on the extremities.
