Bivariate relationships between the variables analyzed on preoperative MRI and CP topography
| MRI Variablesa | P Value | Specific Relationships |
|---|---|---|
| 3V occupation | <.001 | Free: highest rate in Sellar-SS (57%) |
| Occupied: in 100% of Pseudo-3V, Secondary, 3V-Not-Strict, and 3V-Strict cases | ||
| Stalk visualization | <.001 | Visible (wholly identifiable): highest rate in 3V-Strict (79%) |
| Infiltrated: highest rate in 3V-Not-Strict (23%) | ||
| Amputated (lower half visible): highest rate in 3V-Not-Strict (68%) | ||
| Not visible: highest rates in Sellar-SS (92%%), Pseudo-3V (100%), and Secondary-3V (92%) | ||
| Hypothalamus level relative to the CP | <.001 | Lower third: highest rate in 3V-Strict (82%) |
| Middle: highest rates in 3V-Not-Strict (91%) and Secondary-3V (77%) | ||
| Upper third: highest rates in Sellar-SS (100%) and Pseudo-3V (91%) | ||
| Chiasmatic cistern | <.001 | Free: highest rate in 3V-Strict (98%) |
| Partially occupied: highest rate in 3V-Not-Strict (54%) | ||
| Wholly occupied: highest rates in Sellar-SS (86.5%), Pseudo-3V (97%), and Secondary-3V (75%) | ||
| MBA | <.001 | <30°: highest rate in 3V-Not-Strict (43%) |
| 30°–59°: highest rates in Secondary-3V (58%) and 3V-Strict (55%) | ||
| 60°–89°: highest rate in Sellar-SS (64%) | ||
| ≥90°: highest rate in Pseudo-3V (89%) | ||
| Chiasm distortion | <.001 | Compressed downward: highest rates in 3V-Strict (66%) and 3V-Not-Strict (33%) |
| Compressed forward: highest rate in 3V-Not-Strict (40%) | ||
| Stretched forward: highest rate in Secondary-3V (50%) | ||
| Stretched upward: highest rates in Sellar-SS (81%) and Pseudo-3V (70%) | ||
| Tumor shape | <.001 | Round: highest rate in 3V-Strict (76%) |
| Elliptical: highest rate in 3V-Not-Strict (37%) | ||
| Multilobulated: highest rates in Pseudo-3V (62.5%) and Secondary-3V (62.5%) | ||
| Pearlike: highest rates in Sellar-SS (30%) and Pseudo-3V (19%) | ||
| Dumbbell: highest rates in Sellar-SS (13.5%) |
Note:—SS indicates suprasellar; 3V-Not-Strict, not strictly intraventricular or infundibulo-tuberal; Pseudo-3V, suprasellar pseudointraventricular; Secondary-3V, secondary intraventricular category; 3V-Strict, strictly intraventricular.
↵a Only the 7 variables included in the multivariate predictive model are shown.