Table 2.
Histology, radiology, and procedure data
| Parameter | Supra- and infratentorial cases (n = 1000) |
Supratentorial cases only (n = 777) |
|---|---|---|
| Suspected histology of tumor | ||
| Meningoma | 364 (36%) | 297 (38%) |
| Metastasis | 188 (19%) | 141 (18%) |
| Glioblastoma | 164 (16%) | 164 (21%) |
| Astrocytoma °III | 39 (4%) | 38 (5%) |
| Astrocytoma °II | 74 (7%) | 72 (9%) |
| Others | 171 (17%) | 65 (8%) |
| Tumor location | ||
| Frontal | 371 (37%) | 371 (48%) |
| Temporal | 203 (20%) | 203 (26%) |
| Parietal | 109 (11%) | 109 (14%) |
| Occipital | 69 (7%) | 69 (9%) |
| Brainstem | 129 (13%) | - |
| Cerebellar | 94 (9%) | - |
| Intraventricular | 25 (3%) | 25 (3%) |
| Tumor volume (ml) | ||
| Range | 1–272 | 1 |
| Mean ± SD | 22 ± 31.4 | 34.0 |
| Median (IQR) | 10 (3–27)) | 12 (4–32) |
| Greater size (mm) | ||
| Range | 2–124 | 2–124 |
| Mean ± SD | 35 ± 17.1 | 37 ± 17.9 |
| Median (IQR) | 32 (22–45) | 35 (23–47) |
| Midline shift > = 3 mm | 186 (19%) | 181 (23%) |
| Duration of procedure (minutes) | ||
| Range | 20–740 | 53–623 |
| Mean ± SD | 236 ± 102.2 | 229 ± 98.8 |
| Median (IQR) | 218 (162–288) | 215 (162–289) |
| Positioning | ||
| Supine | 673 (67%) | 666 (85%) |
| Prone | 130 (13%) | 84 (11%) |
| Lateral | 71 (7%) | 22 (3%) |
| Sitting | 125 (13%) | 5 (1%) |
| SBP maximum intraoperative (mmHg) | ||
| Range | 90–180 | 90–180 |
| Mean ± SD | 135 ± 16 | 135 ± 16 |
| Median (IQR) | 130 (120–145) | 130 (120–145) |
| SBP minimum intraoperative (mmHg) | ||
| Range | 50–140 | 50–140 |
| Mean ± SD | 100 ± 9.9 | 100 ± 9.8 |
| Median (IQR) | 100 (90–100) | 100 (90–100) |
| Transfusion of erythrocytes, plasma, or platelets | 20 (2%) | 13 (2%) |