Rare Complication After Radiosurgery: Case Report Reveals Risks of Radiation-Induced Cyst Formation
Bilbao, July 3, 2025 – A research team led by Dr. Iñigo L. Sistiaga from the Cruces University Hospital in Spain has documented a rare but serious case of late complications after stereotactic radiosurgery (SRS) for a brain arteriovenous malformation (AVM). The report, published on January 13, 2025, in the Chinese Neurosurgical Journal, describes how a seemingly harmless cyst years after treatment led to a dangerous chronic hematoma. The findings call for a revision of treatment strategies and emphasize the need for long-term follow-up. An AVM is a vascular malformation in which blood flows directly from arteries to veins without passing through the capillary network. This can damage surrounding brain tissue and cause symptoms such as headaches, seizures, or bleeding. SRS, a precise radiation therapy, is considered an effective, non-invasive treatment, especially for AVMs in sensitive brain regions. However, the long-term risks, such as radiation-induced cyst formation (CF) and chronic encapsulated...
