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Extravascular refers to anything located or occurring outside of a blood vessel. This term is commonly used in medical contexts, particularly in pathology and pharmacology. In pathology, extravascular substances are those that have escaped from their normal vascular compartment. For example, bleeding can lead to extravascular accumulation of red blood cells. Similarly, inflammation can cause the leakage of plasma proteins and white blood cells into the interstitial space, which is an extravascular area.
In pharmacology, the term extravascular administration refers to a route of drug delivery that does not involve