CTICasesSevere Paraseptal Emphysema
Imaging findings
CT chest shows extensive, severe paraseptal emphysema with large, subpleural bullae lining the periphery of the lungs, in a patient whose chest radiograph demonstrated only minimal changes.
Key takeaways
Paraseptal emphysema involves the alveolar ducts and sacs abutting the pleura. On radiographs, it is often occult or mimics bullous disease, but CT is highly sensitive for demonstrating the characteristic peripheral, subpleural distribution of cystic airspace destruction.
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