- Etiology: abnormally dilated vessels provide a right-to-left shunt between pulmonary artery and vein resulting in high flow and low-resistance fistulous connection between pulmonary arteries and veins
- CT: non-contrast shows homogeneous / well-circumscribed / non-calcified nodule or a serpiginous mass connected with blood vessels which may have associated phleboliths, contrast shows enhancement of feeding artery, the aneurysmal part, and draining vein on early-phase imaging
- Clinical: presents with dyspnea due to right-to-left shunting or embolic events due to paradoxical emboli, multiple in 33% of patients
Radiology Cases of Pulmonary Arteriovenous Malformation
