1. Diseases of arteries and veins
   1. Varicose Veins
   2. deep vein thrombosis
   3. thrombophlebitis
   4. aneurysms
2. increased risk
   1. Obesity
   2. Hereditary
   3. Proximal thrombus
   4. Proximal compression (e.g. tumor)
   5. legs are dependent for long periods
   6. Higher incidence in women (pregnancy)
3. properties
   1. The superficial veinsof the lower leg, venous pressures in these sites can be markedly elevated
   2. 10% to 20% of adult males 25% to 33% of adult females
   3. Subtopic 3
4. Complications
   1. Stasis dermatitis
   2. Delay healing
   3. Stasis, edema, trophic skin
   4. Varicose ulcers