cephalhematoma

noun

ceph·​al·​he·​ma·​to·​ma ˌsef-əl-ˌhē-mə-ˈtō-mə 

variants or cephalohematoma

ˌsef-ə-lō-ˌhē-mə-ˈtō-mə 

or chiefly British cephalhaematoma

ˌsef-əl-ˌhē-mə-ˈtō-mə 

or cephalohaematoma

ˌsef-ə-lō-ˌhē-mə-ˈtō-mə 

plural cephalhematomas also cephalhematomata -mət-ə 

: a usually benign swelling formed from a hemorrhage beneath the periosteum of the skull and occurring especially over one or both of the parietal bones in newborn infants as a result of trauma sustained during delivery

Examination of the newborns, both at delivery and at discharge, did not detect any increase in morbidity (e.g., fractures, cephalhematomas, or hyperbilirubinemia) in the infants of mothers whose labor was actively managed.

—José A. López-Zeno et al., The New England Journal of Medicine