Subsegmental atelectasis is a descriptive term for a minor peripheral form of lung atelectasis.
Some authors also term it discoid atelectasis or plate-like atelectasis due to its appearance.
It is usually due to a lack of adequate inspiration, and not due to any underlying airway obstruction. It does not usually produce volume loss and subsequent shifting of mobile thoracic structures.
Plain radiograph / CT
It may result in minor linear densities of varying thickness usually parallel to the diaphragm, most commonly at the lung bases or immobile regions of the lungs.
History and etymology
It is named after Felix Georg Fleischner (1893-1969), an Austrian-American radiologist, who first described it in 1938.
- small linear scars
- can mimic this pattern and tends not to resolve on serial imaging
- 1. Woodring JH, Reed JC. Types and mechanisms of pulmonary atelectasis. (1996) Journal of thoracic imaging. 11 (2): 92-108. Pubmed
- 2. Gurney JW. Atypical manifestations of pulmonary atelectasis. (1996) Journal of thoracic imaging. 11 (3): 165-75. Pubmed
- 3. Reed JC. Chest Radiology. (2017) ISBN: 9780323498319
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