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Updated: May 10, 2026

Real-Time Void Spot Assay
Published on: February 10, 2023
Time-dependent changes and gender differences in urinary dysfunction in patients with multiple system atrophy
Tatsuya Yamamoto1, Ryuji Sakakibara, Tomoyuki Uchiyama
1Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan.
Urinary dysfunction in multiple system atrophy (MSA) progresses over time, with urodynamic changes occurring despite stable symptoms. Gender differences in urinary issues are more pronounced in early stages of MSA.
Area of Science:
- Neurology
- Urology
Background:
- Urinary dysfunction is a common complication in multiple system atrophy (MSA).
- Time-dependent changes and gender-specific differences in urinary dysfunction in MSA remain largely uncharacterized.
Purpose of the Study:
- To investigate the progression of urinary dysfunction over time in patients with MSA.
- To identify gender-specific differences in urinary symptoms and urodynamic parameters in MSA patients.
Main Methods:
- Retrospective review of 66 MSA patients with multiple urodynamic examinations and symptom questionnaires.
- Analysis of changes in urinary symptoms and urodynamic findings between examinations.
- Comparison of urinary dysfunction parameters between male and female patients.
Main Results:
- No significant time-dependent worsening of overall urinary symptoms was observed.
- Urodynamic examination revealed significant changes over time, including reduced urine flow, increased post-void residuals, and decreased detrusor contractility.
- Initial gender differences in urinary frequency and voiding symptoms were noted, being more severe in males, but these diminished over time, except for urinary urgency.
Conclusions:
- Voiding dysfunction in MSA can progress without a corresponding increase in reported urinary symptoms.
- Gender plays a significant role, with females generally experiencing less severe urinary dysfunction than males, particularly in the early disease stages.
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