Correlation between transbronchial lung biopsy and lung cytology

Area of Science:

• Pulmonology
• Oncology
• Pathology

Background:

• Respiratory diseases contribute significantly to global morbidity and mortality.
• Histopathology via transbronchial lung biopsy (TBLB) is the gold standard for diagnosing lung diseases.
• Cytology offers a potentially faster, adjunctive diagnostic approach.

Purpose of the Study:

• To evaluate the diagnostic efficacy of various cytology techniques for respiratory lesions.
• To compare the concordance of bronchoalveolar lavage (BAL), brush cytology, and imprint smears with TBLB findings.
• To determine the optimal combination of cytological methods for rapid diagnosis.

Main Methods:

• Retrospective analysis of 100 cases with respiratory lesions.
• Evaluation of BAL, brush cytology, and imprint smears, individually and in combination.
• Comparison of cytological results with histopathological findings from TBLB.

Main Results:

• Imprint cytology demonstrated the highest concordance (77.78%) with biopsy for malignancy detection.
• Bronchoalveolar lavage and brush cytology showed lower concordance (40.91% and 40.00%, respectively).
• Combined BAL and imprint smears improved concordance (42.50%) compared to other combinations for malignancy.

Conclusions:

• A combination of cytological techniques, particularly including imprint smears, is more effective than single tests for suspected lung malignancy.
• Biopsy remains the definitive diagnostic standard for non-neoplastic lung diseases.
• Cytology serves as a valuable adjunctive tool for rapid diagnosis in respiratory medicine.