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a localized effusion of blood beneath the periosteum of the skull of a newborn, due to disruption of the vessels during birth. Cephalhematoma, in contrast to caput succedaneum, does not cross cranial suture lines. It is firmer to the touch than an edematous area: it feels like a water-filled balloon. Cephalhematoma usually appears on the second or third day after birth and disappears within weeks or months.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
A collection of blood beneath the periosteum, frequently seen in a newborn as a result of birth trauma; contrasted with caput succedaneum, in which the effusion overlies the periosteum and consists of serum.
[cephal- + G. haima, blood, + -ōma, tumor]
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