telengiectasia
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Introduction
Dilation of the capillaries & occasionally arterioles resulting in a macular angioma.
Etiology
- primary cutaneous disorders
- linear*
- acne rosacea
- sun-damaged skin
- venous hypertension
- essential telangiectasia
- poikiloderma
- ionizing radiation
- poikiloderma vasculare atrophicans
- spider angioma
- linear*
- systemic disorders
- linear*
- poikiloderma
- spider angioma
- periungual
- papular:
* see clinical manifestations
Pathology
- vasodilatation
- damage to supportive connective tissue
- proliferation of blood vessels
- increased circulating estrogens may be a factor
Clinical manifestations
- may appear as a birthmark
- may occur anywhere on the skin, but occur most frequently on the face, arms, upper trunk & thighs
- linear telangiectasias
- appear as simple red or blue line that disappears with diascopy (blanchable erythema)
- may be associated with flushing, erythema, papulo- pustules, rhinophyma (rosacea)
- may be associated with hyperpigmentation or hypopigmentation & keratosis (sun-damaged skin)
- netlike sheets (essential telangiectasias)*
* image[3]
More general terms
More specific terms
- hemorrhagic telangiectasia
- nail fold telangiectasia
- periungual telangiectasia
- spider angioma (nevus araneus, arterial spider)
Additional terms
References
- ↑ Harrison's Principles of Internal Medicine, 13th ed. Isselbacher et al (eds), McGraw-Hill Inc. NY, 1994, pg 294
- ↑ Taber's Cyclopedic Medical Dictionary, FA Davis, Philadelphia, 1977
- ↑ 3.0 3.1 Matthews S, Dallo C, Tate J. Images in Dermatology. Generalized Essential Telangiectasia. JAMA Dermatol. 2023;159(6):661. https://jamanetwork.com/journals/jamadermatology/fullarticle/2804016