First nationwide survey on systemic wild-type ATTR amyloidosis in Japan |
| |
| Authors: | Yoshiki Sekijima Masahide Yazaki Mitsuharu Ueda Haruki Koike Masahito Yamada Yukio Ando |
| |
| Affiliation: | 1. Department of Medicine (Neurology and Rheumatology), Shinshu University School of Medicine, Matsumoto, Japan;2. Institute for Biomedical Sciences, Shinshu University, Matsumoto, Japan;3. Institute for Biomedical Sciences, Shinshu University, Matsumoto, Japan;4. Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan;5. Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya, Japan;6. Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan |
| |
| Abstract: | Objective: A nationwide survey on systemic wild-type ATTR (ATTRwt) amyloidosis was conducted to elucidate the frequency, clinical picture and possible diagnostic issues of ATTRwt amyloidosis in Japan.Methods: A questionnaire was sent to 4629 clinical departments across Japan. A total of 2341 (50.6%) responses were returned completed for further analysis.Results: Fifty-one patients with ATTRwt amyloidosis (82% male) were identified between January 2012 and December 2014. The study subjects were identified in 11 departments at 10 institutes. The mean age of onset and diagnosis were 71.6 and 73.6?years, respectively. The main clinical findings were cardiac failure (76%), cardiac conduction defects/arrhythmia (59%), renal dysfunction (49%), carpal tunnel syndrome (45%) and spinal canal stenosis (22%).Conclusions: ATTRwt amyloidosis is diagnosed in a limited number of institutes in Japan and is therefore considered to be underdiagnosed. |
| |
| Keywords: | Wild-type ATTR amyloidosis senile systemic amyloidosis nationwide survey transthyretin amyloid |
|
|
