Table 1 Diagnostic yield of combined CNB and FNAB versus FNAB or CNB in the studied patients (n = 30)
| Â | Final diagnosis | Diagnostic yield of combined FNAB and CNB | FNAB | CNB | c2(FEp) | ||||
|---|---|---|---|---|---|---|---|---|---|
No. | % | No. | % | No. | % | No. | % | ||
All | 30 | 100.0 | 30 | 100.0 | 30 | 100.0 | 30 | 100.0 | – |
 Malignant lesions | 23 | 76.7 | 22 | 73.3 | 18 | 60.0 | 22 | 73.3 | 3.067 (0.187) |
  Lung carcinoma | |||||||||
   Small cell carcinoma | 1 | 3.3 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | – |
   Adenocarcinoma | 10 | 33.3 | 10 | 33.3 | 9 | 30.0 | 10 | 33.3 | 0.077 (0.781) |
   Squamous cell carcinoma | 5 | 16.7 | 5 | 16.7 | 4 | 13.3 | 5 | 16.7 | 0.131 (1.000) |
   Undifferentiated carcinoma | 4 | 13.3 | 4 | 13.3 | 2 | 6.7 | 4 | 13.3 | 0.741 (0.671) |
  Mesothelioma | 1 | 3.3 | 1 | 3.3 | 0 | 0.0 | 1 | 3.3 | 2.0 (1.000) |
  Others |  |  |  |  |  |  |  |  |  |
  Metastatic adenocarcinoma (colon) | 1 | 3.3 | 1 | 3.3 | 1 | 3.3 | 1 | 3.3 | 0.0 (1.000) |
  Metastatic adenocarcinoma (unknown primary) | 1 | 3.3 | 1 | 3.3 | 1 | 3.3 | 1 | 3.3 | 0.0 (1.000) |
 Benign lesions | 7 | 23.3 | 7 | 23.3 | 1 | 3.3 | 7 | 23.3 | 10.50*(0.005*) |
  Dense fibrous tissue | 3 | 10.0 | 3 | 10.0 | 0 | 0.0 | 3 | 10.0 | 6.0 (0.100) |
  Necrotizing granuloma | 3 | 10.0 | 3 | 10.0 | 0 | 0.0 | 3 | 10.0 | 6.0 (0.100) |
  Lipoid pneumonia | 1 | 3.3 | 1 | 3.3 | 1 | 3.3 | 1 | 3.3 | – |
 Undiagnosed | 0 | 0.0 | 1 | 3.3 | 11 | 36.7 | 1 | 3.3 |  |
  Undiagnosed | 0 | 0.0 | 1 | 3.3 | 11 | 36.7 | 1 | 3.3 | 10.417*(0.001*) |