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Azygos lobe

Case contributed by Maxime St-Amant
Diagnosis certain

Presentation

Cough. Rule out pneumonia.

Patient Data

Age: 25
Gender: Female
x-ray

Azygos lobe. Otherwise, the chest x-ray is normal, without signs of pneumonia.

Case Discussion

An azygos lobe, while not a true accessory lobe, is a common anatomical variant. It is demonstrated in the right upper zone of frontal chest x-rays and presents as a linear density coursing towards the right hilum with a typical 'teardrop' at its inferior aspect representing the azygos vein. 

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