They are small dilated blood vessels near the surface of the skin or mucous membranes, measuring between 0.5 and 1 millimeter in diameter. They can develop anywhere on the body but are commonly seen on the face around the nose, cheeks, and chin. They can also develop on the legs, specifically on the upper thigh, below the knee joint, and around the ankles.
Some telangiectasia are due to developmental abnormalities that can closely mimic the behavior of benign vascular neoplasms. They may be composed of abnormal aggregations of arterioles, capillaries, or venules. Because telangiectasias are vascular lesions, they blanch when tested with diascopy.
Telangiectasia in the legs is often related to the presence of venous hypertension within underlying varicose veins. Flow abnormalities within the medium sized veins of the leg (reticular veins) can also lead to the development of telangiectasia. Factors that predispose to the development of varicose and telangiectatic leg veins include
• Gender: Females are affected approximately four to one to males.
• Lifestyle/Occupation: Those who are involved with prolonged sitting or standing in their daily activities have an increased risk of developing varicose veins.
• Acne rosacea
• Environmental damage such as that caused by sun or cold exposure
• Trauma to skin such as contusions or surgical incisions.
• Chronic treatment with topical corticosteroids.
Nd Yag Vein Removal.