Rasmussen aneurysm

Case contributed by Sepehr Haghighi


Chronic cough and hemoptysis

Patient Data

Age: 6 years
Gender: Female

A large cavity with surrounding with air space opacity is seen in the right lower lobe. Aneurysmal branch arising from the left lower lobe pulmonary artery is visible within the cavity suggestive of Rasmussen aneurysm without peripheral hematoma formation. 

Tree-in-bud appearance is seen in the lung (not shown here) indicating active endobronchial infection.

Case Discussion

After further evaluation, Mycobacterium tuberculosis was isolated and TB proven.

Rasmussen aneurysm is an uncommon complication of pulmonary tuberculosis and represents a pulmonary artery aneurysm adjacent or within a tuberculous cavity 1.

CT pulmonary angiography is the investigation of choice 2. Often seen on contrasted chest images as a focal dilatation of one of the pulmonary segmentary arteries adjacent to tuberculous parenchymal change or a chronic tuberculous cavity.

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