lymphangiosarcoma

A malignant neoplasm derived from vascular tissue, i.e., an angiosarcoma, in which the neoplastic cells originate from the endothelial cells of lymphatic vessels, usually developing in the arm several years after radical mastectomy.

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lymph·an·gio·sar·co·ma .lim-.fan-jē-ō-(.)sär-'kō-mə n, pl -mas also -ma·ta -mət-ə a sarcoma arising from the endothelial cells of lymphatic vessels

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n.

a rare malignant tumour of the lymphatic vessels. It is most commonly seen in the chronically swollen (oedematous) arms of women who have had a mastectomy for breast cancer and may be induced by radiation.

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lym·phan·gio·sar·co·ma (lim-fan″je-o-sahr-koґmə) [lymph- + angiosarcoma] a malignant tumor of vascular endothelial cells arising from lymphatic vessels; it may arise in a limb that is the site of chronic lymphedema, particularly secondary to radical mastectomy.