Table 2.
Correlation of preoperative MRI with histopathology to show the number of individual levels with pathological lymph nodes on the lateral neck in Level II (A), Level V (B), and the statistical correlates for MRI (C)
| MRI positive | Histopathology malignant | ||
|---|---|---|---|
| Yes | No | Total | |
| A. Level II | |||
| Yes | 15 | 12 | 27 |
| No | 1a | 3 | 4 |
| Total | 16 | 15 | |
| B. Level V | |||
| Yes | 6 | 2 | 8 |
| No | 3a | 20 | 23 |
| Total | 9 | 22 | |
| % | Level II (95% CI) | Level V (95% CI) |
|---|---|---|
| C. Accuracy of MRI | ||
| Sensitivity | 94 (70–100) | 67 (30–93) |
| Specificity | 20 (4–48) | 91 (71–100) |
| PPV | 56 (35–75) | 75 (35–97) |
| NPV | 75 (19–99) | 87 (66–97) |
PPV positive predictive value, NPV negative predictive value, CI confidence interval
aOne patient excluded because of indefinite histopathology