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Area of Science:

  • Neurology
  • Urology
  • Autonomic Dysfunction

Background:

  • Urological dysfunction is a primary manifestation of autonomic failure in multiple system atrophy (MSA).
  • Lower urinary tract (LUT) dysfunction in MSA can stem from various underlying pathophysiologies.
  • Urodynamic examination is crucial for assessing LUT dysfunction in MSA patients.

Purpose of the Study:

  • To evaluate the pathophysiology of urological symptoms in MSA patients.
  • To compare urodynamic patterns of LUT dysfunction between MSA-Parkinsonism (MSA-P) and MSA-Cerebellar (MSA-C) subtypes.

Main Methods:

  • Retrospective analysis of 74 patients with possible or probable MSA undergoing urodynamic studies (2004-2019).
  • Collected demographic data, medical history, physical examination, and urodynamic assessments for storage and voiding dysfunction.
  • Compared urodynamic findings between MSA-P and MSA-C subtypes.

Main Results:

  • Detrusor overactivity was observed in 58.1% of patients.
  • Detrusor underactivity (62.1%) and detrusor sphincter dyssynergia (24.6%) were common during the voiding phase.
  • MSA-P patients exhibited weaker detrusor contractility compared to MSA-C patients (pdetQmax 26.2 vs. 34.4 cmH20, P=0.04).
  • Neurogenic LUT dysfunction consistent with MSA was found in 56.2%, while 35.6% suggested other urological comorbidities.

Conclusions:

  • Urodynamic evaluation is essential for analyzing LUT dysfunction patterns in MSA.
  • Impaired detrusor contractility is more prevalent in MSA-P, warranting further research.
  • Distinguishing neurogenic LUT dysfunction from other urological conditions is important for patient management.