Pulmonary parenchymal bands
Dr Yuranga Weerakkody and Dr Frank Gaillard et al.
Parenchymal bands are a HRCT finding commonly encountered among patients with asbestosis.
They are typically over 2 cm in length running though the lung parenchyma and usually extend from a pleural surface. They are formed in a number of ways 1:
- scars
- atelectasis
- thickening of interlobular septae of a number of adjacent secondary pulmonary lobules
- fibrosis of peribronchovascular interstitium
Parenchymal bands are encountered in a wide range of pulmonary diseases and represent one of the many end-stage fibrotic findings. To mention a few causes:
- asbestosis : found in 60% of patients 1
- sarcoidosis 2
- silicosis 2
- pulmonary fibrosis
- sequelae of ARDS 4
- infections including
- pulmonary paracoccidioidomycosis 3
- and many many more
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