Pathology and sensitivity of current clinical criteria in corticobasal syndrome |
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Authors: | Haruka Ouchi MD Yasuko Toyoshima MD PhD Mari Tada MD PhD Mutsuo Oyake MD PhD Izumi Aida MD Itsuro Tomita MD PhD Akira Satoh MD PhD Mitsuhiro Tsujihata MD PhD Hitoshi Takahashi MD PhD Masatoyo Nishizawa MD PhD Takayoshi Shimohata MD PhD |
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Institution: | 1. Department of Neurology, Brain Research Institute, Niigata University, , Niigata, Japan;2. Department of Pathology, Brain Research Institute, Niigata University, , Niigata, Japan;3. Department of Neurology, Nagaoka Red Cross Hospital, , Nagaoka, Japan;4. Department of Neurology, Niigata National Hospital, National Hospital Organization, , Kashiwazaki, Japan;5. Department of Neurology, Nagasaki Kita Hospital, , Nagasaki, Japan |
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Abstract: | The aim of this study was to investigate corticobasal syndrome with respect to underlying pathologies, the ability of current clinical criteria to detect early stages of disease, and symptoms and signs predicting background pathologies. We retrospectively analyzed the clinicopathological findings from patients with corticobasal syndrome. We also analyzed whether those findings fulfilled the diagnostic criteria for corticobasal degeneration (CBD). Finally, we investigated characteristic clinical features that are specific to each background pathology. Of 10 consecutive autopsied patients who had corticobasal syndrome (mean age ± standard deviation, 67.9 ± 9.3 years; male:female ratio, 6:4), three had corticobasal degeneration pathology, three had progressive supranuclear palsy, three had Alzheimer's disease, and one had atypical four‐repeat tauopathy. Nine patients fulfilled Mayo criteria, and all 10 patients fulfilled modified Cambridge criteria at the later stage, but only two patients fulfilled either clinical criteria within 2 years of disease onset. Five patients fulfilled the clinical criteria for possible CBD (p‐CBD), and one patient fulfilled the clinical research criteria for probable sporadic CBD (cr‐CBD) at the later stage. Only two patients fulfilled the criteria for either p‐CBD or cr‐CBD within 2 years of disease onset. Although we could not find any predictive characteristic clinical features that were specific to CBD pathology, only patients with progressive supranuclear palsy developed apraxia of eyelid opening and cerebellar ataxia. Myoclonus and memory impairment, especially if they appear at an early stage of the disease, may predict Alzheimer's disease pathology. Sensitivity of the available clinical criteria for corticobasal syndrome was poor within 2 years of disease onset. © 2013 International Parkinson and Movement Disorder Society |
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Keywords: | corticobasal syndrome corticobasal degeneration diagnostic criteria |
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