telangiectasia
Introduction
Introduction Telangiectasia refers to the persistent expansion of small blood vessels. Most of the dilated blood vessels are small veins or small arteries, and red silky, reticular or stellate lesions appear on the skin. The fading of the pressure. Normal people's nose and sides of the nose, due to wind and sun, visible mild telangiectasia, is a normal range. However, if there is a wide range of expansion, it is a manifestation of certain diseases. The telangiectasia ring purple disease is unknown, and it belongs to lymphocyte perivascular capillary vasculitis. Senile telangiectasia is a physiological skin atrophy and relaxation. Caused by poor elasticity.
Cause
Cause
Climate and environmental factors: long-term living in a relatively harsh living environment, such as the thin air of the plateau, the skin hypoxia leads to an increase in the number of red blood cells, and the vasoconstriction dysfunction causes permanent telangiectasia.
Stimulation of physical factors: such as temperature changes, the tolerance of capillaries exceeds the normal range, causing telangiectasia, excessive sun exposure, chronic photodermatitis, dry skin and so on.
Examine
an examination
Related inspection
Capillary pulsation
According to the analysis of the etiology and mechanism of telangiectasia, young children are mostly congenital. Its characteristics often combined with the developmental abnormalities of other tissues, and more family history. Most of the primary are adults, no family history and the reasons are unknown.
Secondary are more common in: vascular diseases, autoimmune diseases, physical, endocrine factors and others.
Diagnosis
Differential diagnosis
The diagnosis should be differentiated from the following symptoms:
1. Hereditary hemorrhagic telangiectasia Autosomal dominant hereditary disease characterized by multiple capillaries or small arteriolar venous dilatation of the skin, mucosa and viscera and repeated bleeding of the lesion. The liver is often involved.
2. Pulmonary arteriovenous fistula is a congenital pulmonary vascular malformation, the blood vessels are enlarged or distorted or form a cavernous hemangioma. The pulmonary artery blood flows directly into the pulmonary vein without passing through the alveoli, and the pulmonary artery directly communicates with the vein to form a short circuit. 1
