FIG 3. Case 2: callosal injury from long-standing obstructive hydrocephalus in a patient with aqueductal stenosis.

A, Sagittal T1-weighted (500/15/2) image obtained before shunt placement shows moderate upward displacement of the corpus callosum (arrows).

B, T1-weighted sagittal (500/15/2) image 5 months after ventricular shunting shows diffuse areas of decreased signal within the posterior body of the corpus callosum (arrows), which was most likely caused by compression against the falx.

C and D, Axial proton density– and T2-weighted (2200/20,80/1) images show increased signal within the body of the corpus callosum (arrows) corresponding to abnormalities in the sagittal plane.