Table 2 Variables observed on MRI.
From: Pleomorphic xanthoastrocytomas of adults: MRI features, molecular markers, and clinical outcomes
Variable | Number (n = 50) |
|---|---|
Median size (mm) | 44 (13–80) |
Number | |
Single lesion | 47 (94%) |
Multiple lesions | 3 (6%) |
Location | |
Single lesion (n = 47) | |
Frontal lobe | 12 (26%) |
Temporal lobe | 17 (36%) |
Parietal lobe | 4 (9%) |
Occipital lobe | 1 (2%) |
Frontal-temporal lobe | 3 (6%) |
Temporal-parietal lobe | 1 (2%) |
Temporal-occipital lobe | 4 (9%) |
Parietal-occipital lobe | 1 (2%) |
Lateral ventricle | 2 (4%) |
Dorsal midbrain | 1 (2%) |
Thalamus | 1 (2%) |
Multiple lesions (n = 3) | |
Frontal lobe, temporal-parietal lobe, insular lobe and corpus callosum | 1 |
Parietal lobe, temporal lobe | 1 |
Frontal lobe, occipital lobe and lateral ventricle | 1 |
Superficial and attached to the meninges | 22 (44%) |
Adjacent to and invasion of the lateral ventricles | 9 (18%) |
Hemorrhage | 9 (18%) |
Degree of peritumoral edema | |
No | 9 (18%) |
Mild (<10 mm diameter) | 11 (22%) |
Moderate to severe (≥10 mm diameter) | 30 (60%) |
Imaging pattern | |
Predominantly solid | 33 (66%) |
Predominantly cystic with a mural nodule | 14 (28%) |
Predominantly cystic without a mural nodule | 3 (6%) |
Enhancement pattern in the solid component (n = 47) | |
Mild | 1 (2%) |
Marked | 46 (98%) |
Enhancement pattern in the cystic wall (n = 17) | |
No | 7 (41%) |
Mild | 2 (12%) |
Marked | 8 (47%) |
DWI parameters | |
Mean ADC (×10−3 mm2/s) | 0.83 ± 0.17 (0.58–1.42) |
Mean ADC ratio | 1.02 ± 0.22 (0.68–1.66) |
