A haematoma, or hematoma, is 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 haemangioma which is an abnormal build up of blood vessels in the skin or internal organs. Presentation Haematoma—from Greek αίμα, haima, blood + τωμα, t-oma—indicating an abnormality. Haematomas exist as bruises (ecchymosis), but can also develop in organs.There… (More on Hematoma)