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FIG 2. Case 7: callosal injury from long-standing obstructive hydrocephalus.
A, Sagittal T1-weighted (500/15/2) image obtained before shunt placement shows marked upward displacement of the corpus callosum (straight arrows). Note fourth ventricular mass (curved arrow) extending into and obstructing the aqueduct.
B, Sagittal T1-weighted (500/20/2) image obtained 3 months after ventricular shunting shows diffuse areas of decreased signal within the body of the corpus callosum (arrows), which is likely the result of compression against the falx.
C and D, Axial proton density– (C) and T2-weighted (D) (2200/20,80/1) images show increased signal within the body of the corpus callosum (arrows), corresponding to abnormalities in the sagittal plane.
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