Spider angiomata


Nevus arcane us or spider telangiectasia.

Vascular lesions made up of a central arteriole surrounded by several radiating vessels.

Common in chronic lever disease and consist of a central arteriole from which numerous small venules radiate.

Mechanisms of formation include arteriolar vasodilatation, revascularization from angiogenic factors, direct effects of alcohol and increased estrogen.

Can be seen in healthy children and pregnant women.

Commonly found on the trunk, face and upper limbs.

Common in alcoholic cirrhosis, and can be seen in pregnancy, contraceptive use, thyrotoxicosis, and malnutrition.

Believed to be related to an elevation of serum estradiol levels, or due to neovascularization from elevated vascular endothelial growth factor levels.

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