Axial CT image shows multiple micronodules and small nodules throughout both lungs. Note that there are subpleural nodules (best seen along the fissures), and they arrange in a non-uniform fashion.
Facts: Perilymphatic Nodules
- Located along pulmonary lymphatics (wall and central core structure of the secondary pulmonary lobule)
- Most notable along the fissures (subpleural region)
- Can be peribronchovascular in distribution
- Common causes: sarcoidosis and lymphangitic carcinomatosis
- Less common cause: silicosis, coal-worker pneumoconiosis
Our case: sarcoidosis