Angiosarcoma. Definition

Medical Definition: Angiosarcoma

Malignant tumor that begins in cells that line blood vessels or lymph vessels, characterized by the formation of vascular channels lined by one or more layers of atypical endothelial cells, often look immature, and accompanied by solid masses of anaplastic tissue or poorly differentiated. Cancer that begins in the blood vessels is called hemangiosarcoma. Cancer that starts in lymphatic vessels is called lymphangiosarcoma.

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