invited comment

1
5. Gupta RK, Kumar R. Benign brain tumours and psychiatric morbidity: a 5-year retrospective data analysis. Aust N Z J Psychiatry 2004;38:316–319. 6. Reisch T, Brekenfeld C, Barth A. A case of hydrocephalus occlusus presenting as bipolar disorder. Acta Psychiatr Scand 2005;112:159–163. 7. Kocher R, Linder M, Stula D. Primary brain tumors in psychiatry. Schweiz Arch Neurol Neurochir Psychiatry 1984;135:217–227. 8. Hamilton M.A rating scale for depression. J Neurol Neurosurg Psychiatry 1960;23:56–62. 9. Montgomery P, Asberg B. A new depression scale designed to be sensitive to change. Br J Psychiatry 1979;134: 382–389. 10. Young RC, Biggs JT, Ziegler VE, Meyer DA. A rating scale for mania: reliability, validity and sensitivity. Br J Psychi- atry 1978;133:429–435. 11. Stejskal EO, Tanner JE. Spin diffusion measurements – spin echoes in presence of a time-dependent field gradient. J Chem Phys 1965;42:288–292. 12. Skare S, Andersson J. On the effects of gating in diffusion imaging of the brain using single shot EPI. Magn Reson Imaging 2001;19:1125–1128. 13. Basser PJ, Pierpaoli C. Microstructural and physiological features of tissues elucidated by quantitative-diffusion- tensor MRI. J Magn Reson B 1996;111:209–219. 14. Mori S, Crain BJ, Chacko VP, Van Zijl PC. Three-dimen- sional tracking of axonal projections in the brain by magnetic resonance imaging. Ann Neurol 1999;45:265–269. 15. Berk M, Malhi GS, Mitchell PB et al. Scale matters: the need for a Bipolar Depression Rating Scale (BDRS). Acta Psychiatr Scand 2004;110:39–45. 16. Krishnan KRR. Psychiatric and medical comorbidities of bipolar disorder. Psychosom Med 2005;67:1–8. 17. Lubman DI, Velakoulis D, McGorry PD et al. Incidental radiological findings on brain magnetic resonance imaging in first-episode psychosis and chronic schizophrenia. Acta Psychiatr Scand 2002;106:331–336. 18. Brambilla P, Nicoletti MA, Sassi RB et al. Corpus callosum signal intensity in patients with bipolar and unipolar dis- order. J Neurol Neurosurg Psychiatry 2004;75:221–225. DOI: 10.1111/j.1600-0447.2006.00908.x Invited comment The case report by Xu and colleagues nicely illustrates critical issues relevant to the correct diagnosis and management of bipolar disorder. Firstly, it highlights the Ôimprecision of current diagnostic criteriaÕ and adds to the growing evidence suggesting that misdiagnosis of bipolar disorder II is perhaps more common than realized and, if so, possibly leads to ineffective therapeutic interventions which in some cases may retard or even worsen the outcome. Secondly, it emphasizes the need for Ôgreater awareness of potential organic etiologyÕ in psychiatric symptoms and argues for the use of modern imaging techniques in minim- izing misdiagnosis of psychiatric disorders in clin- ical settings. At present, the role of neuroimaging is limited to that of a research tool helping to understand the development and course of bipolar disorder (1, 2). It is hoped that, supported and guided by such empirical data, it would make its way into clinical practice and help to establish or rule out certain psychiatric diagnoses, as well as to formulate and monitor appropriate treatment strategies, over the coming years. Veena Kumari King’s College London Institute of Psychiatry, Department of Psychology, PO78 London SE5 8AF, UK References 1. Bruno SD. Neuroimaging of bipolar disorder: emphasis on novel MRI techniques. Epilepsia 2005;46(Suppl. 4):14–18. 2. Hajek T, Carrey N, Alda M. Neuroanatomical abnormalities as risk factors for bipolar disorder. Bipolar Disord 2005;7:393–403. Xu et al. 250

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5. Gupta RK, Kumar R. Benign brain tumours and psychiatricmorbidity: a 5-year retrospective data analysis. Aust N Z JPsychiatry 2004;38:316–319.

6. Reisch T, Brekenfeld C, Barth A. A case of hydrocephalusocclusus presenting as bipolar disorder. Acta PsychiatrScand 2005;112:159–163.

7. Kocher R, Linder M, Stula D. Primary brain tumors inpsychiatry. Schweiz Arch Neurol Neurochir Psychiatry1984;135:217–227.

8. Hamilton M. A rating scale for depression. J NeurolNeurosurg Psychiatry 1960;23:56–62.

9. Montgomery P, Asberg B. A new depression scale designedto be sensitive to change. Br J Psychiatry 1979;134:382–389.

10. Young RC, Biggs JT, Ziegler VE, Meyer DA. A rating scalefor mania: reliability, validity and sensitivity. Br J Psychi-atry 1978;133:429–435.

11. Stejskal EO, Tanner JE. Spin diffusion measurements –spin echoes in presence of a time-dependent field gradient.J Chem Phys 1965;42:288–292.

12. Skare S, Andersson J. On the effects of gating in diffusionimaging of the brain using single shot EPI. Magn ResonImaging 2001;19:1125–1128.

13. Basser PJ, Pierpaoli C. Microstructural and physiologicalfeatures of tissues elucidated by quantitative-diffusion-tensor MRI. J Magn Reson B 1996;111:209–219.

14. Mori S, Crain BJ, Chacko VP, Van Zijl PC. Three-dimen-sional tracking of axonal projections in the brain bymagnetic resonance imaging. Ann Neurol 1999;45:265–269.

15. Berk M, Malhi GS, Mitchell PB et al. Scale matters: theneed for a Bipolar Depression Rating Scale (BDRS). ActaPsychiatr Scand 2004;110:39–45.

16. Krishnan KRR. Psychiatric and medical comorbidities ofbipolar disorder. Psychosom Med 2005;67:1–8.

17. Lubman DI, Velakoulis D, McGorry PD et al. Incidentalradiological findings on brain magnetic resonance imagingin first-episode psychosis and chronic schizophrenia. ActaPsychiatr Scand 2002;106:331–336.

18. Brambilla P, Nicoletti MA, Sassi RB et al. Corpus callosumsignal intensity in patients with bipolar and unipolar dis-order. J Neurol Neurosurg Psychiatry 2004;75:221–225.

DOI: 10.1111/j.1600-0447.2006.00908.x

Invited comment

The case report by Xu and colleagues nicelyillustrates critical issues relevant to the correctdiagnosis and management of bipolar disorder.Firstly, it highlights the �imprecision of currentdiagnostic criteria� and adds to the growingevidence suggesting that misdiagnosis of bipolardisorder II is perhaps more common than realizedand, if so, possibly leads to ineffective therapeuticinterventions which in some cases may retard oreven worsen the outcome. Secondly, it emphasizesthe need for �greater awareness of potential organicetiology� in psychiatric symptoms and argues forthe use of modern imaging techniques in minim-izing misdiagnosis of psychiatric disorders in clin-ical settings.At present, the role of neuroimaging is limited to

that of a research tool helping to understand the

development and course of bipolar disorder (1, 2).It is hoped that, supported and guided by suchempirical data, it would make its way into clinicalpractice and help to establish or rule out certainpsychiatric diagnoses, as well as to formulate andmonitor appropriate treatment strategies, over thecoming years.

Veena KumariKing’s College London

Institute of Psychiatry, Department of Psychology,PO78

London SE5 8AF, UK

References

1. Bruno SD. Neuroimaging of bipolar disorder: emphasis onnovel MRI techniques. Epilepsia 2005;46(Suppl. 4):14–18.

2. Hajek T, Carrey N, Alda M. Neuroanatomical abnormalitiesas risk factors for bipolar disorder. Bipolar Disord2005;7:393–403.

Xu et al.

250