. 2015 Apr 7;10(4):e0123890. doi: 10.1371/journal.pone.0123890

Table 1. Features and associated descriptors assessed on the pre-operative MR exam.

Feature	Descriptor
Tumour location	Frontal
Tumour location	Non-frontal
Tumour volume	Measured in cm³
Contrast-enhancing tumour volume	Measured in cm³
Degree of enhancement	Less than the choroid plexus
Degree of enhancement	Equal to/greater than the choroid plexus
Heterogeneity of enhancement	No enhancement/homogenous enhancement
Heterogeneity of enhancement	Heterogeneous enhancement
Peri-tumoural edema	Absent
	< 1 cm from tumour margin
	≥ 1 cm from tumour margin
Mass effect	None/mild
Mass effect	Moderate/severe
Intra-tumoural hemorrhage	Present
Intra-tumoural hemorrhage	Absent
Cyst formation	Present
Cyst formation	Absent
Tumour margin	Irregular
Tumour margin	Smooth
Minimum apparent diffusion coefficient	Measured in mm²/sec