Table 2. Diagnostic yield of CT-guided percutaneous transthoracic needle biopsy.
Parameters | Lesion size | Overall (n=560) | ||
---|---|---|---|---|
≤1 cm (n=61) | 1.1–2.0 cm (n=214) | 2.1–3.0 cm (n=285) | ||
True positive | 30 | 118 | 163 | 311 |
True negative | 23 | 85 | 111 | 219 |
False positive | 0 | 0 | 0 | 0 |
False negative | 4 | 8 | 10 | 22 |
Inconclusive | 4 | 3 | 1 | 8* |
Diagnostic accuracy (%) | 86.9 | 94.9 | 96.1 | 94.6 |
*, final diagnosis of the 8 lesions is benign disease for 3 lesions and malignant disease for the other 5 lesions.