title: Gas study in arrested hydrocephalus with chiasmatic block.
mesh_terms: D006801:Humans; D006849:Hydrocephalus / Q000000981:diagnostic imaging*; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009897:Optic Chiasm / Q000000981:diagnostic imaging*; D011011:Pneumoencephalography / Q000379:methods