Granuloma
Aggregation of macrophages in response to chronic inflammation / From Wikipedia, the free encyclopedia
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A granuloma is an aggregation of macrophages (along with other cells) that forms in response to chronic inflammation. This occurs when the immune system attempts to isolate foreign substances that it is otherwise unable to eliminate.[1] Such substances include infectious organisms including bacteria and fungi, as well as other materials such as foreign objects, keratin, and suture fragments.[2][3][4][5]
"Granulomatous" and "Granulomatous reactions" redirect here. For the Interstitial granulomatous drug reaction, see Interstitial granulomatous drug reaction.
Not to be confused with Granulation tissue.
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Picture of a granuloma (without necrosis) as seen through a microscope on a glass slide: The tissue on the slide is stained with two standard dyes (hematoxylin: blue, eosin: pink) to make it visible. The granuloma in this picture was found in a lymph node of a patient with a Mycobacterium avium infection. | |
Specialty | Pathology |
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