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Table 1 Cranial nerve monitoring and mapping statistics and corresponding current parameters
| Patient | Diagnosis (histologic) | Localization | Symptoms before surgery | Approach | Tumor removal radicality | Cranial nerve identification | Symptom dynamics | |
|---|---|---|---|---|---|---|---|---|
| At discharge | 3 months after surgery | |||||||
| Patient 1. 63 years old | Trigeminal nerve neurinoma | Meckel’s cave | Paresis of CNs III, V on the right | Extended lateral (D) | Total | V and VII on the right | Paresis of CN III on right remained, increased paresis of CN VI on right up to plegia, CN V failure remained as well | Regression of CN VI right paresis |
| Patient 2.50 years old | Chordoma | Clivus area | Paresis of CNs III, VI on the right | Posterior extended transclival | Total | III bilaterally, VI on the left | Without dynamics | Partial regression of oculomotor disorders |
| Patient 3.49 years old | Trigeminal nerve neurinoma | Left cavernous sinus | Paresis of CNs III, IV, VI on the left | Extended lateral (L) | Total | VI and V on the left | Partial regression of oculomotor disorders | Further regression of oculomotor disorders |
| Patient 4.72 years old | Chordoma | Endo-supra-infra-latero (R, L)sellar | Chiasmatic syndrome, plegia of CN III on the left | Transsellar + extended bilateral | subtotal | VI bilaterally | Without dynamics | n/a |
| Patient 5.59 years old | Trigeminal nerve neurinoma | Right cavernous sinus | Hypoesthesia in projection of all 3 branches of CN V on right | Extended lateral (R) | Total | VI and V on the right | Partial regression of hypoesthesia | Without dynamics |
| Patient 6.66 years old | Chordoma | Clivus area | Left hemiparesis: arm—2, leg—3. Paresis of CNs V and VII on the left. Left hemi-hypoesthesia | Posterior extended transclival | Total | III bilaterally, VI on the right | Partial regression of left hemiparesis: arm—3, leg—4 | Partial regression of left hemiparesis: arm—4, leg—4. Regression of VII left nerve paresis |
| Patient 7.26 years old | Chordoma | Clivus area and left cavernous sinus | Paresis of CNs V and VI on the left | Posterior extended transclival | Total | III on the left | Partial regression of VI left nerve paresis | Without dynamics |
| Patient 8.65 years old | Chordoma | Endo-supra-infrasellar | Headache | Posterior extended transclival + extended bilateral | Total | VI bilaterally | Regression of headache | Without dynamics |
| Patient 9.70 years old | Chordoma | Both cavernous sinuses | VIS OS = 0.01 | Extended bilateral | Total | VI on the left | VIS OS = 0.03 | VIS OS = 0.04 |
| Patient 10.20 years old | Chordoma | Clivus area | Paresis of CN VI on the left | Posterior extended transclival | Total | VI bilaterally | Partial regression of VI left nerve paresis | Without dynamics |
| Patient 11.59 years old | Pituitary adenoma | Endo-supra-latero(R)sellar | Chiasmatic syndrome | Extended lateral (R) | Total | III on right, VI on the right | Without dynamics | Without dynamics |
| Patient 12.67 years old | Chordoma | Clivus area | Paresis of CN VI on the left | Posterior extended transclival | Total | V and VI on the left | Partial regression of VI left nerve paresis. Regression of headache | Without dynamics |
| Patient 13.31 years old | Chordoma | Clivus area | Paresis of CN VI on the left | Posterior extended transclival | Total | VI on the left | Regression of headache | Without dynamics |
| Patient 14.26 years old | Chordoma | Clivus area | Paresis of CN VI on the left | Posterior extended transclival | Total | VI bilaterally | Regression of VI left nerve paresis | Without dynamics |
| Patient 15.47 years old | Trigeminal nerve neurinoma | Right cavernous sinus | Paresis of CN V on the right | Extended lateral (R) | Total | VI on the right | Without dynamics | Without dynamics |
| Patient 16.65 years old | Trigeminal nerve neurinoma | Right cavernous sinus | Paresis of CN III on the right | Extended lateral (R) | Total | III, VI, V on the right | Increased paresis of CN III on right | Without dynamics |
| Patient 17.54 years old | Recurrent chordoma | Clivus area, left cavernous sinus | Paresis of CN VI on the left | Extended lateral (L) | Total | III, VI on the left | Partial regression of VI left nerve paresis | Regression of VI left nerve paresis |
| Patient 18.62 years old | Meningioma | Clivus area | Paresis of CN XII on the right | Posterior extended transclival | Subtotal | VI on the left | Regression of XII right nerve paresis | Without dynamics |
| Patient 19.33 years old | Cholesteatoma | Clival area | Paresis of CNs V, VII, VIII, IX, on the left | Posterior extended transclival | Subtotal | III, VI, VII, XII on the left | Increased paresis of CN VI on left | Without dynamics |
| Patient 20.72 years old | Recurrent pituitary adenoma | Endo-supra-latero(D)sellar | Headache | Transsellar + extended lateral (R) | Total | III on the right | Negative dynamics of visual functions | Without dynamics |
| Patient 21.53 years old | Meningioma | Petroclival | Headache | Posterior extended transclival | Subtotal | VI on the left | Increased paresis of CN VI on left | Regression of VI left nerve paresis |
| Patient 22.45 years old | Chondroid-chordoma | Clival area | Paresis of CNs VI, V | Posterior extended transclival | Subtotal | III, V on the left | Increased paresis of VI nerve | N/a |
| Patient 23.63 years old | Pituitary adenoma | Endo-supra-infra-latero(S)sellar | Chiasmatic syndrome | Transsellar + extended lateral (S) | Total | III, VI on the left | Regression of III, VI nerves paresis | N/a |
