Azygos lobe and fissure

Case contributed by Dr Safwat Mohammad Almoghazy


Known sigmoid cancer, undergoing staging.

Patient Data

Age: 30 years
Gender: Male

Azygos lobe is incidentally noted (normal variant). Otherwise, the chest x-ray is unremarkable, with no suspicious lesion.

Case Discussion

This is a normal anatomic variant of the right upper lobe due to invagination of the azygos vein and pleura during fetal development. It is not a true accessory lobe as it does not have its own bronchus.

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Case information

rID: 52771
Published: 22nd Apr 2017
Last edited: 14th Aug 2019
System: Chest
Inclusion in quiz mode: Included

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