Parkes Weber syndrome: possible
Assessment of leg length discrepancy and cutaneous “capillary” vascular malformation.
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Dilated vascular structures in the right lower limb involving subcutaneous and multiple muscle compartments. Flow voids and pulsation artefact (particularly laterally) suggest a high flow component consistent with arteriovenous malformation.
Vascular malformations can be divided into high flow (predominantly AV malformations) and low flow (capillary, venous, lymphatic and mixed). Klippel-Trenaunay syndrome usually involves an entire limb and is of the mixed, slow-flow type. Parkes Weber syndrome also typically involves an entire limb, but the malformation contains high-flow components.
Note that Parkes Weber is one man, of Sturge-Weber, Klippel-Trenaunay-Weber, Osler-Weber-Rendu, Pfeifer-Weber-Christian, and Weber-Cockayne fame.