TABLE II.
Operational characteristics of biopsy
| Characteristic | Value |
|---|---|
| Patients (n) | 78 |
|
| |
| Sample type [n (%)] | |
| Core needle | 38 (48) |
| Fine-needle aspiration | 14 (18) |
| Transbronchial biopsy | 11 (14) |
| Pleural fluid cytology or cell block | 6 (7.7) |
| Plasma | 3 (3.8) |
| Brain resection | 2 (2.6) |
| Lung resection | 1 (1.3) |
| Othera | 2 (2.6) |
|
| |
| Biopsy method [n (%)] | |
| Overall | |
| Computed tomography–guided | 25 (32) |
| Bronchoscope or EBUS | 25 (32) |
| Ultrasonography-guided | 14 (18) |
| Plasma | 3 (3.8) |
| Other | 9 (12) |
| Unknown/Not reported | 2 (2.6) |
| Sample showing T790M positivity | |
| Computed tomography–guided | 12 (15) |
| Bronchoscope or EBUS | 9 (12) |
| Ultrasonography-guided | 8 (10) |
| Plasma | 1 (1) |
| Other | 1 (1) |
| Unknown/Not reported | 1(1) |
|
| |
| Biopsy location [n (%)] | |
| Lung or lymph nodesb | 50 (64) |
| Pleural fluid | 11 (14) |
| Liver | 6 (7.7) |
| Bone | 3 (3.8) |
| Plasma | 3 (3.8) |
| Brain | 2 (2.6) |
| Chest wall | 1 (1.3) |
| Peritoneal mass | 1 (1.3) |
| Unknown or missing data | 1 (1.3) |
a
Endobronchial brushing or pericardial fluid cytology.
b
Mediastinal or supraclavicular.
CT = computed tomography; EBUS = endoscopic bronchial ultrasonography