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Venous ulcers (venous insufficiency ulceration, stasis ulcers, stasis dermatitis, varicose ulcers, or ulcus cruris) are wounds that are thought to occur due to improper functioning of venous valves, usually of the legs (hence leg ulcers). They are the major occurrence of chronic wounds, occurring in 70% to 90% of leg ulcer cases. Venous ulcers develop mostly along the medial distal leg, and can be very painful. ==Signs and symptoms== Edema and fibrinous exudate leads to fibrosis of subcutaneous tissues with localized pigment loss and dilation of capillary loops. This is called atrophic blanche. This can occur around ankles and gives an appearance of inverted champagne bottle to legs. Large ulcers may encircle the leg. Lymphoedema results from obliteration of superficial lymphatics. There is hypertrophy of overlying epidermis giving polypoid appearance, known as lipodermatosclerosis. File:Úlceras antes da cirurgia.JPG|Venous ulcer before surgery File:WIRA-Wiki-GH-012-de-Ulkus-Verlauf-unter-wIRA.png|Healing process of a chronic venous stasis ulcer of the lower leg File:Venous ulcer Wound healed in one month - Varicose Vein.jpg|Healing venous ulcer after one month 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Venous ulcer」の詳細全文を読む スポンサード リンク
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