Current imaging techniques such as magnetic resonance, magnetic resonance a
ngiography, computer tomography, ultrasound, plain x-rays, and lymphangiosc
intigraphy have enhanced the ability to define blood and lymph vascular mal
formations in more precise pathophysiologic terms. Not only can these imagi
ng modalities distinguish arterial anomalies from lymphatic and venous angi
odysplasia, but they also readily differentiate edema in the epifascial as
opposed to the subfascial peripheral compartments. Moreover, visceral lymph
angiectasia (e.g., chylous and non-chylous reflux), bone and muscle overgro
wth, agenesis, and fat deposits can also be delineated Clinical examples ar
e provided including an algorithm for approaching these conditions.