title: Obsessive-compulsive disorder secondary to brain dysgerminoma in an adolescent boy: a positron emission tomography case report.
abstract: The neuroanatomical model involved in the pathophysiology of obsessive-compulsive disorder (OCD) postulates a hyperactivation of orbitofrontal, limbic, and basal ganglia circuits. We report a case of OCD secondary to brain dysgerminoma affecting this circuit in an adolescent who responded to citalopram. The patient is a 16-year-old-boy with a midline germinal tumor (dysgerminoma) affecting the caudate nuclei; left lenticular, right internal capsule's genu; and bilateral involvement of the interventricular septum close to the interventricular foramina. He had OCD symptoms and elevated tumor markers when he had a tumor relapse, and fluorodeoxyglucose positron emission tomography showed caudate nuclei involvement. He responded to citalopram that had to be titrated gradually to 80 mg/day.
authors.affiliation: Department of Psychiatry and Medical Psychology, Clínica Universitaria, University of Navarra College of Medicine, Pamplona, Spain.
authors.forename: Pilar
authors.initials: P
authors.lastname: Gamazo-Garrán
authors.forename: Cesar A
authors.initials: CA
authors.lastname: Soutullo
authors.forename: Felipe
authors.initials: F
authors.lastname: Ortuño
mesh_terms: D000293:Adolescent; D001932:Brain Neoplasms / Q000150:complications / Q000000981:diagnostic imaging*; D002421:Caudate Nucleus / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008297:Male; D009771:Obsessive-Compulsive Disorder / Q000000981:diagnostic imaging* / Q000209:etiology / Q000523:psychology; D014055:Tomography, Emission-Computed / Q000379:methods*