Which procedure is commonly used to obtain tissue from a centrally located lung lesion for diagnosis?

Which procedure is commonly used to obtain tissue from a centrally located lung lesion for diagnosis?

• A. Bronchoscopy
• B. CT-guided needle biopsy
• C. Mediastinoscopy
• D. Thoracentesis

Answer: (A)

Central lung lesions sit near the major airways, so the procedure that best provides direct access to the lesion with minimal invasiveness is bronchoscopy. By entering the airway with a bronchoscope you can visualize the lesion, perform biopsies, brushings, or transbronchial needle aspirations right through the bronchial wall, and even sample nearby lymph nodes if needed. This approach yields diagnostic tissue without having to penetrate the chest wall. CT-guided needle biopsy is excellent for peripheral nodules that lie near the chest wall but is less effective and riskier for central lesions because the needle must traverse vital mediastinal structures and airways, reducing yield and increasing complications. Mediastinoscopy focuses on sampling mediastinal lymph nodes rather than the lung parenchyma itself, making it less suitable for obtaining tissue from a central lung lesion. Thoracentesis extracts pleural fluid and is diagnostic only when malignant effusion is present; it doesn’t biopsy the lung lesion directly. So, for a centrally located lesion, bronchoscopy is the commonly used diagnostic tissue source.

Central lung lesions sit near the major airways, so the procedure that best provides direct access to the lesion with minimal invasiveness is bronchoscopy. By entering the airway with a bronchoscope you can visualize the lesion, perform biopsies, brushings, or transbronchial needle aspirations right through the bronchial wall, and even sample nearby lymph nodes if needed. This approach yields diagnostic tissue without having to penetrate the chest wall.

CT-guided needle biopsy is excellent for peripheral nodules that lie near the chest wall but is less effective and riskier for central lesions because the needle must traverse vital mediastinal structures and airways, reducing yield and increasing complications. Mediastinoscopy focuses on sampling mediastinal lymph nodes rather than the lung parenchyma itself, making it less suitable for obtaining tissue from a central lung lesion. Thoracentesis extracts pleural fluid and is diagnostic only when malignant effusion is present; it doesn’t biopsy the lung lesion directly.

So, for a centrally located lesion, bronchoscopy is the commonly used diagnostic tissue source.