CTICasesScimitar Vein Variant with Hypoplastic Right Lung and Possible Left Pulmonary Isomerism
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Imaging findings
A 70-year-old woman presented with an abnormal tubular structure in the right lung and associated right lung hypoplasia on chest radiograph. MRA confirmed a large, tortuous right pulmonary vein draining directly into the left atrium, representing a scimitar vein variant. Additional findings included only two lobes in the right lung and hyperarterial airways (arteries superior to bronchi), suggesting the presence of left pulmonary isomerism.
Key takeaways
This case illustrates a scimitar vein variant where the anomalous vein drains directly into the left atrium, preventing systemic shunting and rendering the patient asymptomatic. Associated features include right lung hypoplasia and potential lobar segmentation anomalies. The presence of hyperarterial airways and altered lobation raises the possibility of more complex congenital conditions such as left pulmonary isomerism, highlighting the spectrum of developmental anomalies.
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