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Table 4: Characteristic MR imaging findings for predicting malignant dural-based tumors
Variables Sensitivity Specificity PPV NPV Accuracy
Lack of dural tail 19.4% 98.0% 75.0% 80.0% 79.7%
Cortical breakthrough 67.7% 95.1% 80.8% 90.7% 88.7%
Leptomeningeal enhancement 32.3% 100.0% 100.0% 82.9% 84.2%
Heterogeneous enhancement on T1WI 71.0% 73.5% 44.9% 89.3% 72.9%
Hypointense signal on T2WI 53.3% 86.2% 66.7% 78.1% 75.0%

Variables	Sensitivity	Specificity	PPV	NPV	Accuracy
Lack of dural tail	19.4%	98.0%	75.0%	80.0%	79.7%
Cortical breakthrough	67.7%	95.1%	80.8%	90.7%	88.7%
Leptomeningeal enhancement	32.3%	100.0%	100.0%	82.9%	84.2%
Heterogeneous enhancement on T1WI	71.0%	73.5%	44.9%	89.3%	72.9%
Hypointense signal on T2WI	53.3%	86.2%	66.7%	78.1%	75.0%