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Glossary

Definition of medical terms used on the web.

Bruise


Accumulation of extravasated blood trapped in the tissues of the skin or in an organ, caused by injury to a blood vessel or because a blood vessel was left open after surgery. It initially causes exit of blood into a space; if the space is limited, outlet pressure decreases and blood flow to the outside may cease. Blood will clot and harden, so in some cases it may be tender to touch.