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An ecchymosis is a hematoma of the skin larger than 10 mm. [2] They may occur among and or within many areas such as skin and other organs , connective tissues , bone , joints and muscle . A collection of blood (or even a hemorrhage ) may be aggravated by anticoagulant medication (blood thinner).
A bruise, also known as a contusion, is a type of hematoma of tissue, [3] the most common cause being capillaries damaged by trauma, causing localized bleeding that extravasates into the surrounding interstitial tissues. Most bruises occur close enough to the epidermis such that the bleeding causes a visible discoloration.
Subgaleal hematoma growth is insidious, as it spreads across the whole calvaria and may not be recognized for hours to days. If enough blood accumulates, a visible fluid wave may be seen. Patients may develop periorbital ecchymosis ("raccoon eyes"). [citation needed]
It refers to one of the three descriptive types of hematoma differentiated by size, the other two being ecchymosis (>1cm in diameter) and purpura (4 to 10mm in diameter). The term is typically used in the plural (petechiae), since a single petechia is seldom noticed or significant.
Raccoon eyes, also known as panda eyes or periorbital ecchymosis, is a sign of basal skull fracture or subgaleal hematoma, a craniotomy that ruptured the meninges, or (rarely) certain cancers. [ 1 ] [ 2 ] Bilateral hemorrhage occurs when damage at the time of a facial fracture tears the meninges and causes the venous sinuses to bleed into the ...
Bruise, which is a hematoma caused by trauma; Petechia, which is a small type of hematoma (<3 mm) Ecchymosis, which is a large type of hematoma (>1 cm) Purpura secondary to clotting disorders; Purpura hemorrhagica in horses; Pigmented purpuric dermatosis; Schamberg disease (progressive pigmentary purpura)
Contusion — Also known as a bruise, this is a blunt trauma damaging tissue under the surface of the skin. Crushing Injuries — Caused by a great or extreme amount of force applied over a period of time. The extent of a crushing injury may not immediately present itself. Ballistic Trauma — Caused by a projectile weapon such as a firearm ...
This leads to formation of hematoma a few hours after the head injury or cranial operation. [1] If injury is more extensive, potentially even a skull fracture, an apparent black eye can sometimes worsen and may require professional medical treatment before it will resolve.