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A localized mass of blood in tissue; usually it clots and becomes encapsulated by connective tissue.



a localized accumulation of liquid blood in tissues.

A hematoma is formed during hemorrhages if the blood does not infiltrate the tissues (such as the subcutaneous tissue, muscles, periosteum, brain, liver, and spleen) but rather separates them, forming a cavity. The primary cause of hematomas is trauma, or rupture of pathologically altered blood vessels. Small hematomas are resorbed without a trace, but an inflammatory reaction develops, with the formation of a thick capsule, around large ones. Hematomas result in swelling, ecchymosis, pain, and dysfunction of the affected organ. Treatment involves application of a pressure bandage, and treatment with cold the first day and then heat. Surgery is indicated if a liver or spleen hematoma ruptures or if the hematoma suppurates.

References in periodicals archive ?
centro-medial (zone I), lateral (zone II) and pelvic hematoma (zone III).
In the setting of a pelvic fracture, DPL should be performed supraumbilical to avoid entering a pelvic hematoma.
Complications included blood transfusions required by two patients, readmission for a pelvic hematoma in one patient, and an intestinal obstruction in one patient that required a 3-day hospital stay.
The only early complications have been a pelvic hematoma in one patient 5 days after CISH, one ileus, and one laparoscopy for unusual postoperative pain, which revealed nothing.