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Vascular nevus
Vascular nevus
classification
Vascular nevi is the most common benign tumor in infants and is formed by the proliferation of the vascular network in the embryonic stage.
There are two types of vascular nevi, hemangioma and vascular malformation.
Vascular malformations are dysplasia of blood vessels, which may not subside for life.
Hemangiomas are caused by the proliferation of vascular endothelial cells. Strawberry hemangioma and cavernous hemangioma are more common clinically. It is generally believed that the natural course of hemangioma can be divided into: proliferative phase, stable phase, and regression phase. Hemangiomas grow rapidly during the newborn period and are generally not life-threatening. It enters the stable phase at the age of 1 to 1 and a half years. 75% to 80% of children with hemangioma are expected to resolve completely spontaneously at the age of 7 years.
For the treatment of hemangioma, the concept of active treatment should generally be established. On the basis of correct diagnosis, the following methods can be selected according to the specific situation:
(1) Laser treatment. In recent years, laser treatment of superficial vascular diseases has become more popular.
(2) Hormone therapy, local hormone injection therapy and oral corticosteroid therapy.
(3) Radiotherapy is generally not recommended for children .
(4) Freezing.
(5) Surgical treatment.
(6) Follow-up observation is the first choice for hemangioma that does not grow significantly or enters a stable or regressive phase.
Treatment methods and principles
The principle of laser treatment of vascular nevi: It uses the absorption peak of hemoglobin in the capillary near the wavelength of 590 nanometers and the less absorption rate of the surrounding normal tissues, and the heat dissipation characteristics and principles of each pulse interval, so that the laser beam can affect hemoglobin It has the effect of thermal coagulation, which leads to the occlusion of blood vessels, and the vascular nevus stops growing and finally disappears. And rely on selective photothermal effect.
Other treatment methods include: hormone therapy, local hormone injection therapy and oral corticosteroid therapy; radiation therapy is generally not recommended for children; follow-up observation, it is the first choice for hemangioma that is not growing significantly or entering the stable or regressive phase s method. Freezing; surgical treatment, etc.
Vascular nevi is the most common benign tumor in infants and is formed by the proliferation of the vascular network in the embryonic stage. There are two types of vascular nevi: hemangioma and vascular malformation. Vascular malformation is vascular dysplasia, which does not subside for life. Hemangiomas are caused by the proliferation of vascular endothelial cells. Strawberry hemangioma and cavernous hemangioma are more common clinically. There are many ways to treat vascular nevi, and it is generally believed that laser is the first choice for treatment.
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