Canadian Medical Guide > Diseases > Neoplasms > Neoplasms by Histologic Type > Lymphatic Vessel Tumors Terms and Definitions

Lymphatic Vessel Tumors

Medical Definition:	Neoplasms composed of lymphoid tissue, a lattice work of reticular tissue the interspaces of which contain lymphocytes. The concept does not refer to neoplasms located in lymphatic vessels.
Guide Notes:	neoplasms composed of lymphatic tissue, not located in lymphatic tissue: TN 135; /blood supply /chem /second /secret /ultrastruct permitted; coord with precoord organ/neopl term; restricted use: Manual 24.2.2.5
Previously Indexed:	Lymphatic Metastasis (1980-1989),Lymphoma (1970-1993)

Lymphatic Vessel Tumors Categories.

	Lymphangioma - A benign tumor representing a congenital malformation of the lymphatic system and made up of newly formed lymph-containing vascular spaces and channels. Lymphangioendothelioma is a type of lymphangioma in which endothelial cells are the dominant component. (From Dorland, 27th ed)
	Lymphangiomyoma - A tumorlike condition characterized by smooth muscle and endothelium proliferation of lymphatic vessels and lymph nodes in the mediastinum and retroperitoneum, also in the lung. It may be manifested by chylous pleural effusion and ascites.
	Lymphangiosarcoma - A malignant tumor originating from the endothelial cells of lymphatic vessels. Most lymphangiosarcomas arise in an arm secondary to radical mastectomy but they sometimes complicate idiopathic lymphedema. The lymphedema has usually been present for 6 to 10 years before malignant changes develop. (From Dorland, 27th ed; Holland et al., Cancer Medicine, 3d ed, p1866)

Lymphatic Vessel Tumors Medical Definitions and Terms

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