Presents as tender, violaceous subcutaneous nodules on the posterior calves that frequently ulcerate and heal with atrophic scars.
Asymptomatic, minute, skin-colored or yellowish-brown lichenoid papules appear in clustered groups, primarily on the trunk of children.
Symmetrical crops of dusky red papules with central necrosis appear on extensor surfaces, healing with distinctive 'pox-like' varioliform scars.
