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Phenotypic variability in Kennedy's disease: implication of the early diagnostic features

Authors
 Jae-Hyeok Lee  ;  Jin-Hong Shin  ;  Kyung-Pil Park  ;  In-Joo Kim  ;  Cheol-Min Kim  ;  Jeong-Geun Lim  ;  Young-Chul Choi  ;  Dae-Seong Kim 
Citation
 ACTA NEUROLOGICA SCANDINAVICA, Vol.112(1) : 57-63, 2005 
Journal Title
ACTA NEUROLOGICA SCANDINAVICA
ISSN
 0001-6314 
Issue Date
2005
MeSH
Adult ; Age of Onset ; Aged ; Comorbidity ; Creatine Kinase/blood ; DNA Mutational Analysis ; Diagnosis, Differential ; Disease Progression ; Early Diagnosis ; Family Health ; Genetic Diseases, X-Linked/diagnosis* ; Genetic Diseases, X-Linked/epidemiology ; Genetic Diseases, X-Linked/physiopathology* ; Gynecomastia/diagnosis ; Gynecomastia/epidemiology ; Gynecomastia/physiopathology ; Humans ; Korea/epidemiology ; Male ; Middle Aged ; Muscular Atrophy/diagnosis ; Muscular Atrophy/epidemiology ; Muscular Atrophy/physiopathology ; Muscular Atrophy, Spinal/diagnosis* ; Muscular Atrophy, Spinal/epidemiology ; Muscular Atrophy, Spinal/physiopathology* ; Paresis/diagnosis ; Paresis/epidemiology ; Paresis/physiopathology ; Phenotype ; Predictive Value of Tests ; Receptors, Androgen/genetics ; Sensation Disorders/diagnosis ; Sensation Disorders/epidemiology ; Sensation Disorders/physiopathology ; Tremor/diagnosis ; Tremor/epidemiology ; Tremor/physiopathology ; Trinucleotide Repeat Expansion/genetics
Keywords
Kennedy's disease ; phenotypic variability ; tremor ; early features
Abstract
Objectives –  The clinical diagnosis of Kennedy's disease (KD) is not easy when the typical manifestations are lacking, especially in early stage of the disease. In our study, we tried to identify the relative frequency of common clinical features and early symptoms in KD.

Method –  Eighteen Korean patients with KD were included. Clinical findings were subdivided into two parts: the age at onset of each clinical symptoms and characteristic signs on investigations. With detailed clinical examinations, the serum creatine kinase (CK) level, electrophysiologic study and DNA analysis were performed and analyzed in detail.

Results –  In KD, the most consistent clinical findings at evaluations included perioral fasciculation with variable bulbar paresis, limb weakness with wasting, hyporeflexia, hand tremor, and elevated CK level. Some distinguishing features, such as X-linked family history, gynecomastia, and sensory abnormalities were absent in a half of cases. Frequent initial clinical findings include tremor (50%) and symptoms other than weakness, such as cramps and fatigability (33.3%).

Conclusion –  We conclude that KD shows variable clinical and electrophysiological features. Our description on the onset and subsequent progression of each clinical finding might help to identify KD in early stage and avoid misdiagnosis.
Full Text
http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0404.2005.00428.x/abstract
DOI
10.1111/j.1600-0404.2005.00428.x
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Neurology (신경과학교실) > 1. Journal Papers
Yonsei Authors
Choi, Young Chul(최영철) ORCID logo https://orcid.org/0000-0001-5525-6861
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/151320
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