B E Pollock1. 1. Department of Neurological Surgery, Mayo Clinic and Foundation, Rochester, Minnesota 55905, USA. pollock.bruce@mayo.edu
Abstract
OBJECTIVE: Causes of neurological deficits after arteriovenous malformation (AVM) radiosurgery, including hemorrhage, radiation injury, and delayed cyst formation, are described. CONCEPT: Occlusive hyperemia has been described as a reason for neurological deterioration after AVM resection. Thrombosis of draining veins or dural sinuses is thought to cause postoperative bleeding or neurological deficits secondary to venous hypertension. In a similar manner, local hemodynamic changes can occur in the brain adjacent to an AVM after radiosurgery if venous outflow is obstructed. Two patients are presented whose cases demonstrate this phenomenon. CONCLUSION: Patients can experience clinical worsening after AVM radiosurgery from premature thrombosis of draining veins. Local hemodynamic changes could explain why imaging changes thought to be radiation related occur more frequently after radiosurgery of AVMs than of tumors.
OBJECTIVE: Causes of neurological deficits after arteriovenous malformation (AVM) radiosurgery, including hemorrhage, radiation injury, and delayed cyst formation, are described. CONCEPT: Occlusive hyperemia has been described as a reason for neurological deterioration after AVM resection. Thrombosis of draining veins or dural sinuses is thought to cause postoperative bleeding or neurological deficits secondary to venous hypertension. In a similar manner, local hemodynamic changes can occur in the brain adjacent to an AVM after radiosurgery if venous outflow is obstructed. Two patients are presented whose cases demonstrate this phenomenon. CONCLUSION:Patients can experience clinical worsening after AVM radiosurgery from premature thrombosis of draining veins. Local hemodynamic changes could explain why imaging changes thought to be radiation related occur more frequently after radiosurgery of AVMs than of tumors.
Authors: Jun Kang; Judy Huang; Philippe Gailloud; Daniele Rigamonti; Michael Lim; Vincent Bernard; Tina Ehtiati; Eric C Ford Journal: Int J Radiat Oncol Biol Phys Date: 2014-07-08 Impact factor: 7.038
Authors: Andrew J Gauden; Lucinda S McRobb; Vivienne S Lee; Sinduja Subramanian; Vaughan Moutrie; Zhenjun Zhao; Marcus A Stoodley Journal: Transl Stroke Res Date: 2019-12-05 Impact factor: 6.829
Authors: B J Daou; G Palmateer; D A Wilkinson; B G Thompson; C O Maher; N Chaudhary; J J Gemmete; J A Hayman; K Lam; D R Wahl; M Kim; A S Pandey Journal: AJNR Am J Neuroradiol Date: 2020-11-19 Impact factor: 3.825