Accessory fissures of the lung

Accessory fissures of the lung usually occur at the borders of bronchopulmonary segments. They are common normal variants but are less commonly seen on imaging.

Some of the more common accessory fissure include 1:

azygos fissure: most commonly seen accessory fissure
inferior accessory fissure
superior accessory fissure
left horizontal fissure
Differential diagnosis
General imaging differential considerations include:

fibrotic bands in lung
References
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