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A localized mass of blood in tissue; usually it clots and becomes encapsulated by connective tissue.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Infants who were born at less than 36 weeks gestational age were also excluded as well as newborn with severe facial bruising or cephalohematoma from more detailed analysis.
Table-1: Total Live births and neonates treated for Year Live Births Neonatal Hyperbilirubinemia 2012 2611 364 2013 2978 389 Total 5589 753 Table-2: Factors associated with unconjugated neonatal hyperbilirubinemia Factors Associated Number Percentage Gender Male 403 53.5 Female 350 46.5 Gestational Age Term 506 67.1 Preterm 247 32.9 Birth Weight Low Birth Weight 105 13.9 Very Low Birth Weight 70 9.3 Extremely Low 35 4.6 Birth Weight Parity Primi 490 65.1 Multi 263 34.9 Mode of Caesarean Section 333 44.2% Delivery Normal Vaginal Delivery 420 55.8% Figure-1: Causes of neonatal hyperbilirubinemia Sepsis 87 Cephalohematoma 35 ABO incompatibility 318 Rh Incompatibility 71 Unknown 245 Note: Table made from pie chart.
Three main differentials for pediatric head swelling are caput succedaneums, subgaleal hemorrhage, and cephalohematomas. A caput succedaneum is a collection of blood under the skin and above the cranial aponeurosis, which occurs most commonly during birth.
Cephalohematoma occurred in 4% of the forceps deliveries and 15% of the vacuum deliveries, Dr.
Escherichia hermanii infection of a cephalohematoma: case report, review of literature and description of a novel invasive pathogen.
These include jaundice in the first day of life, previously jaundiced sibling, early gestational age, significant bruising or cephalohematoma, Rh and ABO incompatibility, G6PD deficiency, and elevated hour-specific serum or transcutaneous bilirubin levels.
Stavis testified that the absence of bleeding between Rosemary's periosteum and her bone tissue, a condition called cephalohematoma, was a key indicator that no trauma occurred to her skull.
On discharge at 22 hours, a cephalohematoma and heart murmur were noted.
* Nonmoldability of fetal skull (resulting in hypermolding, caput formation, and cephalohematoma)
The causes of jaundice were physiological jaundice in 62 (41%) newborns, ABO incompatibility in 45 (30%), Rh incompatibility in 10 (6.6%), G6PD in 14 (9.3%), polycythemia in 13 (8.6%), and cephalohematoma in 7 (4.6%).
The maternal complications like perinial tear vaginal tear cervical tear, extension of episiotomy, traumatic PPH, urinary and fecal in continence, and the fetal complications like impression mark, abrasions on the face, cephalohematoma, skull fracture, and cerebral palsy can occur.