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Transbronchial needle aspiration for histology specimens
A C Mehta1, M S Kavuru, D P Meeker
1Department of Pulmonary Disease, Cleveland Clinic Foundation.
Chest
|December 1, 1989
Summary
Larger gauge (18-G) transbronchial needle aspiration (TBNA) improves tissue diagnosis for lung cancer staging. This method enhances the diagnostic yield of fiberoptic bronchoscopy (FOB), especially for benign conditions.
Area of Science:
- Pulmonology
- Thoracic Surgery
- Oncology
Background:
- Fine-gauge (22-G) transbronchial needle aspiration (TBNA) aids in staging bronchogenic carcinoma but has limitations.
- Cytologic specimens can be contaminated, leading to false positives for unresectability.
- Diagnosing benign conditions via 22-G TBNA is challenging.
Observation:
- 18-G TBNA was performed alongside 22-G TBNA in 34 patients with mediastinal/hilar abnormalities.
- Histologic specimens were obtained in 50% of patients using 18-G TBNA.
- 18-G TBNA yielded a 32% diagnostic rate, including benign conditions.
Findings:
- The overall diagnostic yield of 18-G TBNA was 41% (14/34 patients).
- 18-G TBNA increased the diagnostic yield of fiberoptic bronchoscopy (FOB) from 50% to 58%.
- No false positive results were reported, with few minor complications.
Implications:
- 18-G TBNA is effective for obtaining histologic specimens and diagnosing benign conditions.
- This technique enhances the diagnostic capabilities of FOB in selected cases.
- Improved diagnostic accuracy can lead to more appropriate treatment decisions for lung cancer.