Ecchymosis ("bruising") is discoloration which results from bleeding beneath the surface. Ecchymosis can reveal pathways for fluid movement through loose connective tissue.Forearm bruising shown here developed after catheterization of the patient's radial artery for coronary angiography. Although the original injury was quite small, some blood did escape during insertion of the catheter. (There is a tiny mark at the site of insertion, located near the end of an old scar that has been rendered quite conspicuous by the bruising. The pale color of the scar itself reflects its composition as fairly dense collagen.)
Producing a "black eye" does not require a severe blow to the head. The "shiner" shown here developed after a very small, shallow cut visible here near the end of the patient's eyebrow.
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SIUC / School
of Medicine / Anatomy / David
Last updated: 4 July 2022 / dgk