A swelling or tumor due to proliferation, with or without dilation, of the blood vessel s (hemangioma) or lymphatics (lymphangioma). [angio- + G. -oma, tumor]
- acquired tufted a. enlarging erythematous macules and plaques in children and adults, composed microscopically of lobules of capillaries and spindle cells that project into thin-walled venular dermal clefts. SYN: angioblastoma of Nakagawa.
- capillary a. SYN: capillary hemangioma.
- cavernous a. vascular malformation composed of sinusoidal vessels without a large feeding artery; can be multiple, especially if inherited as an autosomal dominant trait. SYN: nevus cavernosus.
- cherry a. SYN: senile hemangioma.
- petechial angiomas multiple lesions resembling petechiae but due to dilation of capillary walls; they are obliterated by pressure.
- a. serpiginosum the presence of rings of red dots on the skin, especially in female children, which tend to widen peripherally, due to dilation of superficial capillaries. SYN: essential telangiectasia (2), primary telangiectasia.
- spider a. a telangiectatic arteriole in the skin with radiating capillary branches simulating the legs of a spider; characteristic, but not pathognomonic, of parenchymatous liver disease; also seen in pregnancy, often disappearing after delivery, and at times in normal persons. SYN: arterial spider, nevus araneus, spider hemangioma, spider nevus, spider telangiectasia, vascular spider.
- superficial a. SYN: capillary hemangioma.
- telangiectatic a. a. composed of dilated vessels.
- a. venosum racemosum tortuous swelling caused by varicosities of superficial veins.
- venous a. vascular anomaly composed of anomalous veins. SYN: venous malformation.

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an·gi·o·ma .an-jē-'ō-mə n, pl -mas also -ma·ta -mət-ə a tumor (as a hemangioma or lymphangioma) composed chiefly of blood vessels or lymphatic vessels
an·gi·o·ma·tous -mət-əs adj

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a benign tumour composed of blood vessels or lymph vessels. Cherry angiomas (or Campbell de Morgan spots) are small red spots on the trunk in middle-aged or elderly people. They are completely harmless and consist of a minor vascular malformation. An arteriovenous angioma (or malformation) is a knot of distended blood vessels overlying and compressing the surface of the brain. It may cause epilepsy, or one of the vessels may burst, causing a subarachnoid haemorrhage or a haemorrhage within the brain (intracerebral haemorrhage). This type of angioma may be suitable for surgical removal or stereotactic radiotherapy. It may be associated with a purple birthmark on the face: this is called the Sturge-Weber syndrome. Ateriovenous malformations may occur in many other parts of the body, where they are often asymptomatic. See also haemangioma, lymphangioma.

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an·gi·o·ma (an″je-oґmə) [angio- + -oma] a tumor whose cells tend to form blood vessels (hemangioma) or lymph vessels (lymphangioma); a tumor made up of blood vessels or lymph vessels. Called also endothelioma angiomatosum and vascular tumor.

Medical dictionary. 2011.

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