Empiric distribution summaries for the preoperative MR imaging metrics according to LGG molecular subtype
| MR Imaging Metric | IDHmut-Codel | IDHmut-Noncodel | IDHwt |
|---|---|---|---|
| Tumor size (cm) | |||
| Median | 6.6 | 6.9 | 6.2 |
| IQR (1st to 3rd quartile) | (5.2–8.6) | (5.3–9.3) | (4.6–8.4) |
| Range (minimum–maximum) | (1.9–14.2) | (1.7–15.3) | (1.1–15.0) |
| Location | |||
| Central | 26 (25.0%) | 43 (33.3%) | 29 (39.7%) |
| Peripheral | 78 (75.0%) | 86 (66.7%) | 44 (60.3%) |
| No. of involved lobes | |||
| Median | 2.0 | 2.0 | 2.0 |
| IQR (1st to 3rd quartile) | (1.0–3.0) | (1.0–3.0) | (1.0–3.0) |
| Range (minimum–maximum) | (1.0–6.0) | (1.0–9.0) | (1.0–8.0) |
| Corpus callosum extension | 44 (42.3%) | 46 (35.7%) | 18 (24.2%) |
| Hydrocephalus | 12 (11.5%) | 27 (20.9%) | 7 (9.6%) |
| Midline shift (cm) | |||
| Median | 0.00 | 0.30 | 0.00 |
| IQR (1st to 3rd quartile) | (0.00–0.43) | (0.00–0.80) | (0.00–0.10) |
| Range (minimum–maximum) | (0.00–2.70) | (0.00–1.90) | (0.00–1.40) |
| Eloquent cortex | 33 (31.7%) | 45 (34.9%) | 24 (32.9%) |
| Ependymal extension | 65 (62.5%) | 80 (62.0%) | 58 (79.5%) |
| Margin | |||
| <33% sharp/circumscribed | 32 (30.8%) | 31 (24.0%) | 28 (38.4%) |
| 33%–66% sharp/circumscribed | 55 (52.9%) | 38 (29.5%) | 31 (42.5%) |
| >66% sharp/circumscribed | 17 (16.3%) | 60 (46.5%) | 14 (19.2%) |
| Contrast enhancement | 21 (31.8%) | 51 (39.5%) | 30 (41.1%) |
| Necrosis | 17 (16.3%) | 14 (10.9%) | 18 (24.7%) |