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THE CORPUS CALLOSAL ANGLE IN THE DIAGNOSIS OF CEREBRAL VENTRICULAR ENLARGEMENT

2009; Wiley; Volume: 49; Issue: 3 Linguagem: Inglês

10.1111/j.1600-0404.1973.tb01312.x

1600-0404

Ottar Sjaastad, Arne Nordvik,

Traumatic Brain Injury and Neurovascular Disturbances

The corpus callosal angle was measured in 5 groups of patients: control patients, patients with hydrocephalus ex vacuo, patients with normal pressure hydrocephalus, patients with probable normal hydrocephalus and patients with pressure hydrocephalus. The diagnosis of normal pressure hydrocephalus was based on isotope cisternography and the failure of air to accumulate on the surface near the sagittal sinus during airencephalography. The angle in controls (mean 134°) and patients with hydrocephalus ex vacuo (mean 135°) was almost invariably ≧ 120°, and was significantly different from the mean angle in the pressure hydrocephalus group (105°) (P<0.001). The mean angle in the normal pressure hydrocephalus group (118°) was significantly lower than the angle in the hydrocephalus ex vacuo group (P <0.01). There was some overlap between the angles in these two groups. An angle below 120° usually indicates pressure or normal pressure hydrocephalus. On the other hand, an angle exceeding 120° is compatible with both pressure and normal pressure hydrocephalus as well as hydrocephalus ex vacuo.