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Louis CS Tan 1 Article
‘Hummingbird’ Sign in a Patient with Guam Parkinsonism-Dementia Complex
Tianrong Yeo, Louis CS Tan
J Mov Disord. 2017;10(3):145-148.   Published online August 8, 2017
DOI: https://doi.org/10.14802/jmd.17025
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  • 2 Citations
AbstractAbstract PDFSupplementary Material
We present a case of a 71-year-old male Chamorro patient from Guam who presented with progressive supranuclear palsy (PSP)-Richardson’s syndrome. Considering his strong family history of parkinsonism and a PSP phenotype, he was clinically diagnosed with Guam parkinsonism-dementia complex (PDC). Magnetic resonance imaging (MRI) of the brain revealed prominent midbrain atrophy with preserved pontine volume, forming the ‘hummingbird’ sign, which has not been described before in Guam PDC. Molecular analysis of the chromosome 9 open reading frame 72 gene (C9orf72) showed only 6 GGGGCC repeats. We discuss the clinico-pathological similarities and differences between PSP and Guam PDC, and highlight the topography of neuropathological changes seen in Guam PDC to explain the appearance of the ‘hummingbird’ sign on MRI.

Citations

Citations to this article as recorded by  
  • Discriminative pattern of reduced cerebral blood flow in Parkinson’s disease and Parkinsonism-Plus syndrome: an ASL-MRI study
    Lina Cheng, Xiaoyan Wu, Ruomi Guo, Yuzhou Wang, Wensheng Wang, Peng He, Hanbo Lin, Jun Shen
    BMC Medical Imaging.2020;[Epub]     CrossRef
  • Tauopathy and Movement Disorders—Unveiling the Chameleons and Mimics
    Jacky Ganguly, Mandar Jog
    Frontiers in Neurology.2020;[Epub]     CrossRef

JMD : Journal of Movement Disorders