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The passage of blood from ruptured blood vessels into subcutaneous tissue, marked by a purple discoloration of the skin.

[New Latin, from Greek ekkhumōsis, extravasation, from ekkhumousthai, to extravasate : ek-, out; see ecto- + khumos, juice; see gheu- in Indo-European roots.]

ec′chy·mot′ic (-mŏt′ĭk) adj.
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References in periodicals archive ?
Most common type of first episode of bleeding observed was bruises and ecchymotic patches.
Physical examination revealed multiple abrasions and bruises on the patient's face, chest, abdomen, and limbs, accompanied with a deformed and ecchymotic right arm.
The severity and extension of the ecchymotic lesions of purpura fulminans can increase, caused by peripheral vasoconstriction secondary to any vasopressor drugs that may be used during shock, which was the case with this patient.
On skin examination, there are serpiginous and annular confluent erythematous urticarial plaques with a central ecchymotic discoloration over the eyes, peripheral malar distribution, neck, chest, abdomen, back, buttock, extremities, hands, and feet.
An ecchymotic patch was present on the left second toe, and a similar small lesion was present on the left big toe.
Petechial to ecchymotic hemorrhages on the heart (A) and lung (B) (Gross)
Various histologic subtypes have described, including anaplastic, hyperkeratotic, lymphangioma-like, bullous, telangiectatic, ecchymotic, keloidal, pyogenic granuloma-like, micronodular, intravascular, glomeruloid, and pigmented KS, as well as KS with sarcoidlike granulomas and, importantly, KS with myoid nodules.
Physical exam revealed marked bilateral lower extremity edema and an ecchymotic rash below the knee.
The lungs were diffusedly hyperemic with some localized foci of ecchymotic heamorrhages on the ventral surfaces of the left caudal and right middle lobes.
The liver is friable, mottled, swollen and discolored had multiple regions of focal necrosis, pin point or ecchymotic hemorrhages.
The pulses were not palpable and there were ecchymotic regions in the lower extremities.