Intramuscular<unk>  development and progression on the vastus lateralis muscle from 6 hours after trauma to 86 hours. Some<unk> s are visible under the surface of the skin (commonly called bruises) or possibly felt as masses/lumps. Lumps may be caused by the limitation of the blood to a sac, subcutaneous or intramuscular tissue space isolated by fascial planes. This is a key anatomical feature that helps prevent injuries from causing massive blood loss. In most cases the<unk>  such as a sac of blood eventually dissolves; however, in some cases they may continue to grow such as due to blood seepage or show no change. If the sac of blood does not disappear, then it may need to be surgically cleaned out/repaired. The slow process of reabsorption of<unk> s can allow the broken down blood cells and hemoglobin pigment to move in the connective tissue. For example, a patient who injures the base of their thumb might cause a<unk> , which will slowly move all through their finger within a week. Gravity is the main determinant of this process.<unk> s on articulations can reduce mobility of a member and present roughly the same symptoms as a fracture. In most cases, movement and exercise of the affected muscle is the best way to introduce the collection back into the bloodstream. A misdiagnosis of a<unk>  in the vertebra can sometimes occur; this is correctly called a hemangioma (buildup of cells) or a benign tumor.
Hematoma
Deep vein thrombosis
Seroma
Angioma
Coma
Breast hematoma
Stoma 
Noma 