CTICasesTakayasu Arteritis mimicking CTEPH
Imaging findings
CT pulmonary angiography and MRA show diffuse, undulatory narrowings and occlusions of the bilateral upper lobe pulmonary arteries, associated with severe circumferential stenosis of the left subclavian artery.
Key takeaways
Large-vessel vasculitis (such as Takayasu arteritis) can involve the pulmonary arteries, presenting with stenoses, occlusions, and mosaic perfusion that mimic CTEPH. The presence of systemic arterial involvement (e.g., subclavian or carotid stenosis) is a key differentiator.
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