| 2000–2002 | 2003–2004 | 2005–2006 | |
| Number of FB done (non-visible tumour) | 66 | 77 | 53 |
| CT pre-FB | 43 (65%) | 66 (86%) | 45 (85%) |
| Diagnostic yield of FB | 23 (35%) | 49 (63%) | 38 (72%) |
| Positive rate of TBNA | 6/15 (40%) | 24/31 (77%) | 21/28 (75%) |
| TBNA as sole diagnostic modality | 6/23 (26%) | 24/49 (49%) | 21/38 (55%) |