hilar adenopathy
Enlargement of lymph nodes at the lung hilum, often indicating metastatic spread in lung cancer.
Full Definition
Hilar adenopathy refers to enlarged lymph nodes in the hilar region, where the bronchi, pulmonary vessels, and lymphatics enter and exit the lungs. In thoracic oncology, hilar adenopathy is a critical finding that may represent nodal metastases from lung cancer, inflammatory conditions, or other malignancies. Unilateral hilar adenopathy in the setting of a lung mass is highly suggestive of lung cancer with nodal involvement (N1 disease). Bilateral hilar adenopathy may suggest sarcoidosis, lymphoma, or other systemic conditions. The size, characteristics, and metabolic activity of hilar lymph nodes influence staging and treatment decisions, often requiring tissue sampling for definitive characterization.
Usage
Usage note: Adenopathy and lymphadenopathy are interchangeable; specify unilateral vs bilateral when relevant.
In Context
- "Right hilar adenopathy was noted in association with the upper lobe mass, suggesting N1 disease." — Radiology report
- "Bilateral hilar adenopathy without parenchymal abnormality raised suspicion for sarcoidosis." — Clinical note