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macrophage
(redirected from Giant cells)

   Also found in: Medical, Wikipedia 0.28 sec.

macrophage

Type of white blood cell, or leucocyte, found in all vertebrate animals. Macrophages specialize in the removal of bacteria and other micro-organisms, or of cell debris after injury. Like phagocytes, they engulf foreign matter, but they are larger than phagocytes and have a longer lifespan. They are found throughout the body, but mainly in the lymph and connective tissues, and especially the lungs, where they ingest dust, fibres, and other inhaled particles.



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? Mentioned in ? References in periodicals archive
 
A transesophageal biopsy showed caseating epithelioid-cell granulomas with Langhans-type of giant cells and a lymphocytic rim, highly consistent with tuberculosis, although ZN stain was negative (Fig.
Microbiologists thought bacteria could not grow very big because nutrients would not diffuse throughout giant cells.
7) Indicators of malignant potential include the presence of more than 4 mitoses per 10 high-power field, abnormal mitotic features, cellular pleomorphism, and tumor giant cells.
 
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