Hand tumour, X-ray. Coloured angiogram of a section through the swollen and distorted left hand of a 38-year-old female patient, showing a large venous haemangioma (light area, centre) and associated blood vessels (white). Haemangiomas are benign (non-cancerous) tumours arising from the endothelial cells that line blood vessels. They are characterised by an increased number of blood vessels.
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