Fig 2.

Images from the case of a 33-year-old woman with craniopharyngioma.

A, Axial contrast-enhanced T1-weighted MR image obtained before treatment. Arrow and arrowhead indicate edema-like change and tumor, respectively.

B, Coronal contrast-enhanced T1-weighted MR image obtained before treatment. High and low signal mass (arrowhead) is visible at the suprasellar cistern. Low signal edema-like change (arrow) is noted along the left optic tract.

C, Axial heavily T2-weighted MR image obtained before treatment. Arrows indicate edema-like change.

D, Coronal heavily T2-weighted MR image obtained before treatment. Edema-like changes (large arrows) are visible bilaterally along the optic tract and are more prominent on the left side of the brain (right side of the figure). Optic tracts are difficult to differentiate from edema-like changes. On the right side, a curvilinear high signal intensity (small arrow), originating from the edema-like change, is visible.

E, Axial heavily T2-weighted MR image obtained one section above the level of the optic tract 3 months after surgery (at level similar to that shown in C). Edema-like change has disappeared on the right side of the brain. Large Virchow-Robin spaces (arrow, right side of brain), which are present under normal conditions, are visible on the same side. Edema-like change (arrow, left side of brain) seems to remain on the left side.

F, Coronal heavily T2-weighted MR image obtained 3 months after surgery (at level similar to that shown in D). Large Virchow-Robin space (large arrow, right side of brain) is visible on the right optic tract (small arrow). Edema-like change (large arrow, left side of brain) remains on the left side.