When formation of exudate is excessive, a drainage tract may develop through the injured tissue. This channel is often termed

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A fistula is the channel through which excessive exudate passes to drain to the outside. Leukocytosis is a temporary increase in white blood cells. Erythema is redness of the skin or mucosa. Emigration occurs when white blood cells pass through the endothelium and wall of the microcirculation into the injured tissue.

When Formation of Exudate Is Excessive, a Drainage Tract May