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Obsessive-compulsive disorder (OCD) is a challenging psychiatric condition associated with anxiety and ritualistic behaviors. Although medical management and psychiatric therapy are effective for many patients, severe and extreme cases may prove refractory to these approaches. The authors evaluated their experience with Gamma Knife (GK) capsulotomy in treating patients with severe OCD.

A retrospective review of an institutional review board–approved prospective clinical GK database was conducted for patients treated for severe OCD. All patients were evaluated preoperatively by at least one psychiatrist, and their condition was deemed refractory to pharmacological and psychiatric therapy.

Five patients were identified. Gamma Knife surgery with the GK Perfexion unit was used to target the anterior limb of the internal …