- Hilar lymphadenopathy, seen on chest x-ray or chest CT, can be classified as unilateral or bilateral, and if bilateral as symmetrical or asymmetrical.
Unilateral or bilateral asymmetrical
- Tuberculosis (“primary TB”)
- Fungal, atypical mycobacteria, viral, tularemia, anthrax
- Metastatic or primary hilar tumor (bronchogenic carcinoma)
- Sarcoidosis, silicosis, drug reaction
- Sarcoidosis—the prime diagnosis
- Viral infection (adenovirus, mononucleosis)
- Unilateral or bilateral asymmetrical causes can also cause bilateral symmetrical hilar adenopathy
References and Links
- Schwartz DT, Reisdorff EJ. Emergency Radiology, McGraw-Hill 2000.