mediastinal lymph nodes
Lymph nodes located in the mediastinum that are crucial for lung cancer staging and prognosis.
Full Definition
Mediastinal lymph nodes are a group of lymph nodes located in the mediastinum (the central chest cavity between the lungs) that play a critical role in lung cancer staging and treatment planning. These nodes are systematically numbered according to the International Association for the Study of Lung Cancer (IASLC) lymph node map, with stations 2-9 representing different mediastinal regions. Involvement of mediastinal lymph nodes typically indicates more advanced disease (N2 or N3 stage) and significantly impacts prognosis and treatment approach. Assessment of mediastinal nodes is performed through imaging (CT, PET-CT) and tissue sampling techniques such as mediastinoscopy or EBUS-guided biopsy.
Usage
Usage note: Reference specific lymph node stations when known (e.g., station 4R, station 7).
In Context
- "PET-CT revealed hypermetabolic mediastinal lymph nodes concerning for metastatic disease." — Imaging report
- "Systematic mediastinal lymph node dissection was performed during lobectomy." — Operative report