[Nontumorous intrinsic stenosis of the aqueduct of Sylvius].
D002675:Child, Preschool; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology*; D008297:Male; D008636:Mesencephalon / Q000002:abnormalities*
Sténose intrinsèque non tumorale de l'acqueduc de Sylvius.