Developmental venous anomaly with radiation-induced arteriovenous malformation

Developmental venous anomaly (DVA) is considered a congenital vascular anatomic variation with normal draining function. Limited cases of DVA with arteriovenous malformation (AVM) in the territory of DVA have been reported, and the etiology of de novo AVM formation remains unknown and speculative. In this case, it is continuously observed that the inappropriate radiosurgery involving the DVA draining veins led to the disruption of DVA radicles and the secondary formation of de novo AVM and hemodynamic aneurysm. This sequential process exhibited in the present case verified that outflow disturbance underlay the potential etiology of AVM formation drained by adjoining DVA. Meanwhile, it also manifested the importance of preserving the integrity of the collecting veins when treating the DVA by any means.

Automated summary

This article reports a case in which the continuous observation of DVA rupture led to the formation of de novo AVM and hemodynamic aneurysm, suggesting that outflow disturbance may be the potential cause of AVM formation. Meanwhile, it emphasizes the importance of preserving the integrity of collecting veins in the treatment of DVA.