๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
SPIDER ANGIOMA
SPIDER ANGIOMAย ย ICD-10: I78.11
โข A very common red focal telangiectatic network of dilated capillaries radiating from a central arteriole (punctum) (Fig. 9-21A). The central papular punctum is the site of the feeding arteriole with macular radiating telangiectatic vessels.
โข On diascopy, the radiating telangiectasia blanches and the central arteriole may pulsate.
โข Most commonly occurs on the face, forearms, and hands.
โข It is often a normal finding, and is more common in females; occurs in children.
โข It may be associated with hyperestrogenic states, such as pregnancy (one or more in two-thirds of pregnant women), in patients receiving estrogen therapy, e.g., oral contraceptives, or in those with hepatocellular disease such as subacute and chronic viral hepatitis and alcoholic cirrhosis (Fig. 9-21B).
โข Spider angioma arising in childhood and pregnancy may regress spontaneously.
โข The lesion may be confused with hereditary hemorrhagic telangiectasia, ataxia-telangiectasia, or telangiectasia in systemic scleroderma.
โข Lesions may be treated easily with electro- or laser surgery.
โข Synonyms: Nevus araneus, spider nevus, arterial spider, spider telangiectasia, vascular spider.
A B
FIGURE 9-21 โข Spider nevusโ(A) Two small papules from which telangiectasias radiate. Upon compression the lesion blanches completely. (B) Spider nevi on the chest of a patient with cirrhosis.