Segmental lichen aureus distributed along running directions of popliteal and small saphenous veins

Unilateral purpuric lesions

“…The etiology of LA is unclear, and may be related to local trauma, physical work, venous hypertension, certain drugs, infection, and autoimmune diseases 1 LA can occur in both adults and children, usually confined to one side of the lower limbs 1,2 Clinical manifestations of LA are asymptomatic purpuric papules or macules with clear boundaries. 1,2 Histopathology shows a normal connective tissue zone between the epidermis and dermis, a dense band-like lymphocytic infiltrate, erythrocyte extravasation and hemosiderin deposition. 3 The deposition of hemosiderin can be demonstrated with Prussian blue stain.…”