The term “giant cells” was established on the basis of morphologic criteria. Because of their extraordinary size, these cells are inconsistent with the cellularity of normal CSF, and their appearance almost certainly indicates a pathologic process. One can distinguish between two sorts of giant cells according to their origins: those which stem from the tissue of malignant tumors, and those which have developed from leptomeningeal stem cells. Both are impressive for their enormous variety of form.
KeywordsGiant Cell Phagocytic Activity Morphologic Criterion Ventricular Drain Enormous Variety
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