Which procedure is commonly used to sample mediastinal lymph nodes for staging lung cancer?

Which procedure is commonly used to sample mediastinal lymph nodes for staging lung cancer?

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

Answer: (A)

Sampling mediastinal lymph nodes to determine nodal involvement in lung cancer requires direct access to the mediastinal basins. Mediastinoscopy provides a direct surgical window to the superior mediastinum, allowing biopsy of multiple nodal stations (such as those along the trachea and beneath the aortic arch) under vision. This tissue is essential for accurate staging, because confirming metastasis to mediastinal nodes changes treatment decisions, including eligibility for surgery and the need for adjuvant therapy. Bronchoscopy can sample endobronchial or peribronchial tissue and can reach some central nodes, but its yield for mediastinal sampling is more limited compared with mediastinoscopy. CT-guided needle biopsy targets discrete masses near the chest wall rather than core mediastinal nodal basins. Thoracoscopy primarily evaluates the pleura and lung surface and is not the standard method for accessing mediastinal lymph nodes. Therefore, mediastinoscopy is commonly used for sampling mediastinal lymph nodes to stage lung cancer.

Sampling mediastinal lymph nodes to determine nodal involvement in lung cancer requires direct access to the mediastinal basins. Mediastinoscopy provides a direct surgical window to the superior mediastinum, allowing biopsy of multiple nodal stations (such as those along the trachea and beneath the aortic arch) under vision. This tissue is essential for accurate staging, because confirming metastasis to mediastinal nodes changes treatment decisions, including eligibility for surgery and the need for adjuvant therapy.

Bronchoscopy can sample endobronchial or peribronchial tissue and can reach some central nodes, but its yield for mediastinal sampling is more limited compared with mediastinoscopy. CT-guided needle biopsy targets discrete masses near the chest wall rather than core mediastinal nodal basins. Thoracoscopy primarily evaluates the pleura and lung surface and is not the standard method for accessing mediastinal lymph nodes. Therefore, mediastinoscopy is commonly used for sampling mediastinal lymph nodes to stage lung cancer.