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

Neoplasms by Histologic Type

Medical Definition:	A collective term for the various histological types of NEOPLASMS. It is more likely to be used by searchers than by indexers and catalogers.
Guide Notes:	to collect neopl by histol type; not used for indexing; policy: Manual section 24; also TN Suppl: Tumor Key for human & corresponding vet tumors (does not contain exper tumors); TN 135: correct use of tissue type terms; restricted use: Manual 24.2.2.5; DF

Neoplasms by Histologic Type Categories.

	Histiocytic Disorders, Malignant - Distinctive neoplastic disorders of histiocytes. Included are acute monocytic leukemias, malignant histiocytosis (HISTIOCYTOSIS, MALIGNANT), and true histiocytic lymphomas.
	Leukemia - A progressive, malignant disease of the blood-forming organs, characterized by distorted proliferation and development of leukocytes and their precursors in the blood and bone marrow. It is classified according to degree of cell differentiation as acute or chronic, and according to predominant type of cell involved as myelogenous or lymphocytic. (Dorland, 28th ed)
	Lymphatic Vessel Tumors - 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.
	Lymphoma - A general term for various neoplastic diseases of the lymphoid tissue.
	Neoplasms, Complex and Mixed - Neoplasms composed of more than one type of neoplastic tissue.
	Neoplasms, Connective and Soft Tissue - Neoplasms developing from some structure of the connective and subcutaneous tissue. The concept does not refer to neoplasms located in connective or soft tissue.
	Neoplasms, Germ Cell and Embryonal - Neoplasms composed of primordial germ cells of embryonic gonads or of elements of the germ layers of the embryo. The concept does not refer to neoplasms located in the gonads or present in an embryo or fetus.
	Neoplasms, Glandular and Epithelial - Neoplasms composed of glandular tissue, an aggregation of epithelial cells that elaborate secretions, and of any type of epithelium itself. The concept does not refer to neoplasms located in the various glands or in epithelial tissue.
	Neoplasms, Gonadal Tissue - Neoplasms composed of ovarian or testicular tissue. This concept does not refer to neoplasms located in the ovaries or testes.
	Neoplasms, Nerve Tissue - Neoplasms composed of nerve tissue. This concept does not refer to neoplasms located in the nervous system or its component nerves.
	Neoplasms, Vascular Tissue - Neoplasms composed of vascular tissue. This concept does not refer to neoplasms located in blood vessels.
	Nevi and Melanomas - A collective term for the various types of nevi and melanomas.
	Odontogenic Tumors - Neoplasms produced from tooth-forming tissues.

Neoplasms by Histologic Type Medical Definitions and Terms

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