title: A growth in bipolar disorder?
abstract: OBJECTIVE
  This case report suggests that screening of patients with psychiatric symptoms using modern neuroimaging can help identify organic causes of mental illness.
  
  
  METHODS
  A single case study was reported.
  
  
  RESULTS
  We report the case of a 25-year-old woman with a recent diagnosis of bipolar II disorder having an magnetic resonance imaging (MRI) scan as part of a research project that reveals an intraventricular brain tumour. The latter is most likely the cause of her irritability and 'hypomanic' symptoms and is defined anatomically using diffusion tensor imaging and structural and functional imaging using MRI and positron emission tomography.
  
  
  CONCLUSIONS
  The lesion in this individual case most probably produces mood symptoms by impinging upon the fornix, a component of the limbic system. However, more generally, the increase in diagnosis of bipolar disorder has to be tempered against alternate causes of similar symptoms and necessitates vigilance of potential organic mechanisms.
authors.affiliation: Department of Circulation and Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
authors.forename: J
authors.initials: J
authors.lastname: Xu
authors.forename: I-A
authors.initials: IA
authors.lastname: Rasmussen
authors.forename: E M
authors.initials: EM
authors.lastname: Berntsen
authors.forename: K
authors.initials: K
authors.lastname: Moss
authors.forename: R
authors.initials: R
authors.lastname: Shnier
authors.forename: J
authors.initials: J
authors.lastname: Lagopoulos
authors.forename: G S
authors.initials: GS
authors.lastname: Malhi
mesh_terms: D000328:Adult; D001714:Bipolar Disorder / Q000150:complications*; D001921:Brain / Q000000981:diagnostic imaging; D002551:Cerebral Ventricle Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000473:pathology; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D049268:Positron-Emission Tomography