新生児脳内出血の2例

Two Cases of Intracerebral Hemorrhage in The Full-Term Neonatal Infant

I．はじめに

　新生児頭蓋内出血の中で脳内出血が占める割合は過去の報告で2.5-19.5％^2,7-9）であり，それを成熟児のみに限定すると7.2-18％^2,3,8,9）である．成熟児では硬膜下出血が多く，大半は天幕や大脳鎌の裂傷に基づくものと考えられている^{2,4,8,9,15）}．ところが脳内出血に関しては，その発生頻度が少ないためか，多くは考察はされてない^1,12,15）．

　われわれは最近，新生児脳内出血の成熟児2例を経験したので，その発生機序を中心に報告する．

Intracranial hemorrhage in neonatal infants is mostly noted in the subependymal or subdural space. The former is characteristically noted in premature infants and is attributed to hemorrhage from the subependymal germinal matrix layer. The latter is prevalently noted in full-term neonatal infants and is thought to be associated with injury in the vicinity of the falx cerebri or tentorium cerebelli.

We report two cases of intracerebral hemorrhage, which is relatively rare in full-term neonatal infants.