A hematoma, or haematoma,'s a collection of blood outside the blood vessels, generally the result of hemorrhage, or more specifically, internal bleeding. It isn't to be confused with hemangioma which's an abnormal build up of blood vessels in the skin or internal organs. Presentation Hematoma - from Greek αίμα, haima, blood + τωμα, t-oma, indicating an abnormality. Hematomas exist as bruises (ecchymosis), but can also develop in organs.There're two kinds… (More on Hematoma)