Cutis Marmorata Phlebectasica is a rare congenital disorder characterized by persistent erythrocyanotic mottled areas associated with superficial phlebectases with cutaneous atrophy and ulcerations. The anomaly is present at birth. Spontaneous improvement is the rule. Four cases are described with vascular investigations, coloured echo-Doppler and phlebography. The deep venous tracts are shown to be dilated. Reflux is shown to the superficial veins.