Cardiac 123I-metaiodobenzylguanidine imaging allows early identification of dementia with Lewy bodies during life

Montserrat Estorch, Valle Camacho, Pilar Paredes, Elisabet Rivera, Ato Rodríguez-Revuelto, Albert Flotats, Jaume Kulisevsky, Ignasi Carrio

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Abstract

Purpose: Differential diagnosis between dementia with Lewy bodies (DLB) and other neurodegenerative diseases with cognitive impairment represents a clinical challenge. Due to the overlapping of symptoms, the clinical diagnosis can be modified during the prolonged follow-up of these diseases. The purpose of this study was to assess the ability of cardiac metaiodobenzylguanidine (MIBG) imaging for early identification of DLB. Materials and methods: Since January 2003, all patients with neurodegenerative diseases with cognitive impairment at their first visit at the Memory Unit and clinical criteria of DLB were consecutively recruited and underwent a cardiac 123I-MIBG study. The heart-to-mediastinum ratio (HMR) and the washout rate (WR) of cardiac MIBG uptake were obtained. Results: Sixty-five patients were included. After a clinical follow-up of 4 years, the progress of the disease procured a definite diagnosis in 44 (68%) patients: 19 DLB, 12 Alzheimer disease (AD), and 13 other neurodegenerative diseases with cognitive impairment. HMR was significantly decreased in DLB with respect to the other neurodegenerative diseases. WR was only significantly different between DLB and AD. The HMR cut off point of 1.36 differentiated DLB from the other dementias with a sensitivity of 94% and a specificity of 96% with an accuracy of 95%. Conclusions: Cardiac MIBG imaging performed at the time of the first clinical diagnosis of DLB can help early clinical identification or exclusion of this disease. © 2008 Springer-Verlag.
Original languageEnglish
Pages (from-to)1636-1641
JournalEuropean Journal of Nuclear Medicine and Molecular Imaging
Volume35
Issue number9
DOIs
Publication statusPublished - 1 Sep 2008

Keywords

  • 123 I-MIBG
  • Alzheimer's disease
  • Dementia with Lewy bodies
  • Heart-to-mediastinum ratio
  • Washout rate

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    Estorch, M., Camacho, V., Paredes, P., Rivera, E., Rodríguez-Revuelto, A., Flotats, A., Kulisevsky, J., & Carrio, I. (2008). Cardiac 123I-metaiodobenzylguanidine imaging allows early identification of dementia with Lewy bodies during life. European Journal of Nuclear Medicine and Molecular Imaging, 35(9), 1636-1641. https://doi.org/10.1007/s00259-008-0828-8