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a collection of blood resulting from ruptured blood vessels between the surface of a cranial bone (usually parietal) and the periosteal membrane. Common in vertex births, may disappear w/in 2 to 3 weeks. Does not corss suture lines.
is a localized, easily identifiable, soft area of the scalp, generally resulting from a long and difficult labor or vacuum extraction. Extra fluid should be reabsorbed within 12 hours after birth. Crosses suture lines.
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