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Comparison between KTS and PWS^a
Feature KTS PWS
Types of vascular malformations Slow flow; capillary, lymphatic, venous Fast flow; capillary, arterial, venous
Color of capillary stain Red to purplish Pink and diffuse; multiple capillary stains if RASA1
AV fistulas Insignificant Significant
Marginal venous anomaly Very common Not found
Lymphatic vesicles Present Uncommon
Limb affected Upper 5%, lower 95% Upper 23%, lower 77%
Prognosis Poor quality of life due to venous insufficiency and complications of lymphatic malformation; risk of pulmonary embolism Progressive symptoms with cutaneous ischemia and possible heart failure


a Modified from Reference 5.

Feature	KTS	PWS
Types of vascular malformations	Slow flow; capillary, lymphatic, venous	Fast flow; capillary, arterial, venous
Color of capillary stain	Red to purplish	Pink and diffuse; multiple capillary stains if RASA1
AV fistulas	Insignificant	Significant
Marginal venous anomaly	Very common	Not found
Lymphatic vesicles	Present	Uncommon
Limb affected	Upper 5%, lower 95%	Upper 23%, lower 77%
Prognosis	Poor quality of life due to venous insufficiency and complications of lymphatic malformation; risk of pulmonary embolism	Progressive symptoms with cutaneous ischemia and possible heart failure