PR. J. DE BRUX / CNRI / SCIENCE PHOTO LIBRARY PR. J. DE BRUX / CNRI / SCIENCE PHOTO LIBRARY
Granuloma. Light micrograph of a section through a granuloma. Granulomas are an area of inflammation that occur in many conditions. They are a collection of macrophage white blood cells formed when the immune system isolates substances it thinks are foreign bodies but is unable to eliminate them.
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