Values of each morphological feature of SPNs compared with pathology in the differential diagnosis of benign or malignant Features Spiculate Lobulated calci Pleural tail Cave Number 90 10 16 82 16 Sensitivity (%) 98, 5 100, 0 33, 3 98, 3 100, 0 Specificity (%) 55, 0 33, 3 75, 0 66, 7 36, 4 PR (%) 45, 0 66, 7 25, 0 33, 3 63, 6 NR (%) 1, 5 0, 0 66, 7 1, 7 0, 0 PPV (%) 88, 5 77, 8 80, 0 87, 7 71, 4 NPV (%) 91, 7 100, 0 27, 3 94, 1 100, 0 Accuracy (%) 88, 9 80, 0 43, 7 89, 0 87, 5 Conclusion: Characteristics such as spiculate margin, lobulated, pleural tail signs and cave with high sensitivity > 98.0%, low sensitivity of calcification (33.3%), low specificity (from 33.3% - 75.0%), the rate of false positives is high but false negative is relatively low, except for signs of calcification (66.7%).