F36. Single-Shot Gamma Ventral Capsulotomy for Obsessive Compulsive Disorder and Insufficient Response to Radiosurgery

Gamma Ventral Capsulotomy (GVC) is a radiosurgical procedure employed in the treatment of refractory obsessive-compulsive disorder (OCD). Most studies have made double shot (ds) lesions on each hemisphere, with good efficacy and safety. However, a first study found that four of five patients responded to a safer radiosurgical procedure using smaller, single-shot (ss) lesions (Sheehan et al., 2013). Our aim was to replicate these findings in a different surgical facility.