Table 2.
Skull Base Tumor Characteristics
| Control Group I (simple) (n = 36) | Control Group II (metastases) (n = 43) | Study Group (complex) (n = 46) | |
| Volume (cc) | |||
| Min | 0.19 | 0.12 | 0.62 |
| Max | 206.3 | 66 | 98.3 |
| Mean | 45.61 | 4.87 | 12.6 |
| Median | 8.83 | 1.43 | 7.27 |
| Histology | |||
| Carcinomas | 13 | 33 | 4 |
| Chordoma | 1 | 0 | 1 |
| Gliomas | 0 | 0 | 1 |
| Malignant Gliomas | 2 | 0 | 0 |
| Melanoma | 0 | 10 | 2 |
| Meningioma | 5 | 0 | 21 |
| Pituitary Adenoma | 3 | 0 | 7 |
| Sarcomas | 2 | 0 | 2 |
| Schwannoma (not VIII) | 0 | 0 | 4 |
| Vestibular Schwannoma | 10 | 0 | 4 |
| Location | |||
| Cavernous Sinus | 2 | 0 | 15 |
| CP Angle/IAC | 12 | 0 | 6 |
| Foramen Magnum | 0 | 0 | 4 |
| Nasopharynx | 4 | 0 | 0 |
| Orbital Apex/Parasellar | 3 | 0 | 5 |
| Paranasal Sinus | 4 | 0 | 0 |
| Petroclival | 3 | 0 | 7 |
| Sellar | 3 | 0 | 7 |
| Cerebral Hemishpere | 1 | 34 | 0 |
| Thalamus/Hypothalamus | 0 | 2 | 1 |
| Cerebellum | 0 | 7 | 0 |
| Other* | 4 | 0 | 1 |
* Pons, mandible, infratemporal fossa