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Updated: Feb 22, 2026

Left Atrial Stenosis Induced Pulmonary Venous Arterialization and Group 2 Pulmonary Hypertension in Rat
Published on: November 18, 2018
Pulmonary venous anomalies causing misdiagnosis of pulmonary arteriovenous malformations
Cheng Ting Lin1, Stefan Loy Zimmerman1, Sally Elizabeth Mitchell1
1Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States.
Purpose:
To investigate pulmonary venous anomaly as a cause of pulmonary arteriovenous malformation (PAVM) misdiagnosis.
Materials And Methods:
We reviewed adult patients within a 7.5-year period with CT scans initially diagnosed with PAVM and subsequent conventional pulmonary angiograms.
Results:
Pulmonary arteriography showed no PAVM on arterial phase for 10 out of 99 patients, comprising the misdiagnosed group. Four misdiagnosed patients had pulmonary venous anomalies and six had nodular lesions on CT.
Conclusion:
Pulmonary venous anomalies are vascular mimics of PAVMs that may lead to misdiagnosis. Optimal CT technique and careful imaging review are necessary to minimize inappropriate invasive angiography.
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