Chronic Leg Edema & Venous Insufficiency
There are three forms of edema:
- Venous edema from venous insufficiency - most common cause of leg edema in older adults (30% of the population). Chronic venous insufficiency can result from primary failure of venous valve function or it can be the sequela of an episode of venous thrombosis (post-thrombotic syndrome).
- Lymphedema - consists of excess protein-rich interstitial fluid within the skin and subcutaneous tissue resulting from lymphatic dysfunction (marked foot and toe involvement, verrucous thickened skin, nonpitting when chronic).
- Lipidema - fat maldistribution with sparing of feet, not true edema.