Normal and pathological growth of the foramen occipitale magnum shown in the plain radiography.
The transverse diameter fo the foramen occipitale magnum (f. o. m.) in the semiaxial skull X-ray was measured and evaluated statistically in 174 cerebrally healthy children of different ages. These normal values are contrasted with the foramen diameters of 35 children with verified Arnold-Chiari malformation as well as children with macrocephaly and microcephaly. The values in children with Arnold-Chiari malformation are all above the norm, irrespective of whether or not there is a concomitant hydrocephalus.
D000293:Adolescent; D000367:Age Factors; D001139:Arnold-Chiari Malformation / Q000000981:diagnostic imaging*; D002508:Cephalometry; D002648:Child; D002675:Child, Preschool; D005539:Foramen Magnum / Q000000981:diagnostic imaging*; D006257:Head / Q000002:abnormalities / Q000000981:diagnostic imaging; D006801:Humans; D008831:Microcephaly / Q000000981:diagnostic imaging; D011859:Radiography; D012886:Skull / Q000002:abnormalities / Q000000981:diagnostic imaging