CTICasesPulmonic Valvular Stenosis with Post-Stenotic Dilation of the Main and Left Pulmonary Arteries
[...]. Pulmonic Valvular Stenosis with Post-Stenotic Dilation of the Main and Left Pulmonary Arteries. CTICases. Published September 30, 2016. https://str-case-explorer.pages.dev/c/g7qve
Imaging findings
A chest radiograph shows a prominent left hilar opacity. The lateral projection confirms a dilated left pulmonary artery. CT sagittal views show a dilated main pulmonary artery and a significantly enlarged left pulmonary artery, correlating nicely with the radiograph. The pulmonic valve leaflets appear thickened and immobile, highly suggestive of valvular stenosis on a non-gated study. Lower lobe pulmonary arteries converge towards the enlarged left pulmonary artery, demonstrating the hilar convergent sign.
Key takeaways
Pulmonic valvular stenosis typically causes post-stenotic dilation of the main pulmonary artery and often the left pulmonary artery due to the jet effect. The hilar convergent sign on a chest radiograph can help differentiate an enlarged pulmonary artery from a mass or lymphadenopathy. Thickened, non-moving pulmonic valves on CT, even non-gated, strongly suggest valvular stenosis in the appropriate clinical context.
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Related Valvular cases
- Mitral Valve Prolapse on Non-Gated CT
- TAVI Leaflet Thrombus
- Bicuspid Pulmonic Valve with Main Pulmonary Artery Enlargement
- Mitral Valve Endocarditis and Unilateral Lung Edema
- Aortic Valve Endocarditis
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