noun which may take the genitive case particle 'no'
intracranial; endocranial
Medical term meaning 'inside the skull'. Used attributively with の, as in 頭蓋内出血 (intracranial hemorrhage).
Intracranial hemorrhage requires emergency treatment.
intracranial injury
Compound of 頭蓋 (skull, cranium) + 内 (inside). A straightforward medical term.