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Epithelioid angiosarcoma - high mag.jpg
Micrograph of an angiosarcoma. H&E stain.
Specialty Oncology Edit this on Wikidata

Angiosarcoma is a cancer of the cells that line the walls of blood vessels or lymphatic vessels. The lining of the vessel walls is called the endothelium. However, they should not be confused with cherry hemangiomas.

Most tumors of visceral blood and lymphatic vessel walls are cancerous (malignant).[citation needed] Because these cancers are carried by the blood flow or lymphatic flow, they can more easily metastasize to distant sites, particularly the liver and lungs.

Angiosarcomas show signs of hemorrhage and necrosis. Pathologically, tumor cells show increased nuclear to cytoplasm ratio, nuclear hyperchromasia, nuclear pleomorphism and high mitotic activity.[1]

In dogs, hemangiosarcoma is relatively common, especially in larger breeds such as golden retrievers and Labrador retrievers.[citation needed] In humans, hemangiosarcomas and lymphangiosarcomas of the skin are uncommon.[citation needed] Angiosarcoma of the liver, a rare fatal tumor, has been seen in workers intensively exposed to the gas vinyl chloride monomer (VCM) for prolonged periods while working in polyvinyl chloride (PVC) polymerization plants. It has also been associated with individuals exposed to arsenic-containing insecticides and Thorotrast.[citation needed]

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  1. ^ Perkins, [edited by] Vinay Kumar, Abul K. Abbas, Jon C. Aster ; artist, James A. (2013). Robbins basic pathology (9th ed.). Philadelphia, PA: Elsevier/Saunders. ISBN 9781437717815. 

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