Charcot-Leyden crystals - Definition

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Charcot-Leyden crystals are transparent crystals considered to be the result of the destruction of white blood cells fighting against allergens and parasites, called polynuclear eosinophils, because they were discovered in both the secretions of asthmatic people during an allergic reaction, as well as in certain infections caused by parasites. They are also present in individuals afflicted with leukemia, in the bone marrow as well as the spleen.