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CCTA

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cardiac computed tomography angiography.

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CCU

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coronary care unit.

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CD

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Castleman disease; cluster of differentiation; communicable disease; contagious disease; curative dose.

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Cd

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Symbol for the element cadmium.

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CD2

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A cell adhesion molecule found on the surface of natural killer cells and T cells that is critical for stabilizing contacts between T cells and antigen-presenting cells. It is used clinically as a biomarker in the laboratory evaluation of some leukemias and lymphomas. SEE: cluster of differentiation.

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CD4

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One of a group of proteins on the surface of lymphocytes that enhance immune recognition. Immune cells that express the CD4 molecule are also known as helper T cells; they work with cells that express major histocompatibility complex (MHC) class II molecules to recognize antigens and stimulate cell-mediated and humoral immune responses. The human immunodeficiency virus (HIV) uses the CD4 receptor to infect T lymphocytes, macrophages, and other immunologic cells. SEE: AIDS; cluster of differentiation.

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CD7

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An immunoglobulin embedded within a cell membrane, expressed on the surface of mature T lymphocytes and thymocytes. SEE: cluster of differentiation.

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CD20

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An antigenic protein found only on the surface of B lymphocytes. It can be used to identify and separate those cells from others and can be exploited as a target for monoclonal antibody therapy. Monoclonal antibodies that block CD20 include rituximab and ofatumumab.

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CD25

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The interleukin-2 receptor.

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CD34

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A membrane-bound cell surface antigen present on and identifying T cells, monocytes, and macrophages. It is found principally on endothelial cells and blood-forming stem cells, and regulates cell-to-cell adhesion.

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CD56

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A cell surface glycoprotein heavily expressed by several blood and lymphatic cancers. SEE: cluster of differentiation.

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CD57

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A cell surface antigen expressed on many natural killer cells. SEE: cluster of differentiation.

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CD68

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A glycoprotein expressed on monocytes and tissue macrophages. SEE: cluster of differentiation.

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CD95

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Fas.

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CD163

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A cell surface glycoprotein used in immunohistochemistry to identify monocytes and macrophages. SEE: cluster of differentiation.

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CDA

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Canadian Dental Association; Certified Dental Assistant.

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CDC

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Centers for Disease Control and Prevention.

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CDE

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Certified Diabetes Educator.

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CDER

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Center for Drug Evaluation and Research.

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CDH

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congenital diaphragmatic hernia of the neonate; ...

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