October 18, 2010

Perilymphatic Nodules

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

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