What is corona phlebectasia? 
A fan shaped pattern of small intradermal veins on the medial (inside) or lateral (outside) aspect of the ankle and foot is called corona phlebectatica. Corona implies that they "crown" the ankle. Corona phlebectatica is thought to be an early sign af advanced venous reflux disease or venous insufficiency. This reflux typically originates at the saphenofemoral junction with venous blood refluxing into the great saphenous vein.. Less commonly, saphenopopliteal reflux into the lesser (short) saphenous vein is the underlying cause of corona phlebectatica. Other names for corona phlebectatica include "malleolar flare" and "ankle flare".
The corona phlebectasia is treated by treating saphenofemoral venous reflux disease with VenaCure EVLT, Venefit Procedure (previously called VNUS Closure) or ClariVein Procedure AND treating the ankle veins with sclerotherapy and topical laser treatments, Side effects of extensive injection sclerotherapy for dense telangiectasias and reticular veins in corona phlebectasia can result in hyperpigmentation of the ankle.
Treatments for venous insufficiency include EVLT, Venefit Procedure and ClariVein Procedures.
Watch video of corona phlebectasia which has been injected with foam sclerotherapy by Dr Karamanoukian: