NCIt definition : A flat discoloration of the skin or a mucous membrane, larger in area than a petechia,
caused by the extravasation of blood.;
Alternative definition : NCI-GLOSS: A small bruise caused by blood leaking from broken blood vessels into the
tissues of the skin or mucous membranes.; FDA: A flat discoloration of the skin or a mucous membrane, larger in area than a
petechia, caused by the extravasation of blood. Discolouration under the skin caused
by a bleed underneath. Typically a bruise.;