(A) Cutaneous vasculitis presents clinically as "palpable purpura" on the lower extremities. Although appearing to the eye as macules, the lesions can be palpated, and this contrasts with petechiae, for instance, in thrombocytopenic purpura. The lesions shown here have central punctum that is a darker red and do not blanch with a glass slide, indicating hemorrhage. (B) This is a more advanced stage. Lesions have progressed to hemorrhagic bullae and some have become necrotic. The lesions may progress to ulceration.