Voiding dysfunction in patients with human T-lymphotropic-virus-type-1-associated myelopathy

Area of Science:

• Neurology
• Urology
• Virology

Background:

• Human T-lymphotropic-virus-type-1-associated myelopathy (HAM) is a neurological disorder affecting the spinal cord.
• Voiding dysfunction is a known complication in HAM patients, impacting quality of life.
• Previous studies reported detrusor hyperactivity and detrusor-sphincter dyssynergia as common causes of bladder issues in HAM.

Purpose of the Study:

• To investigate the spectrum of voiding dysfunction in patients diagnosed with HAM.
• To characterize distinct patterns of bladder dysfunction observed in HAM patients.
• To explore potential correlations between disease duration and the type of voiding symptoms.

Main Methods:

• Clinical assessment of patients diagnosed with HAM by neurologists.
• Review of urodynamic study findings in patients presenting with voiding difficulties.
• Comparison of bladder function between patients with different disease durations.

Main Results:

• Most HAM patients exhibited urinary frequency, urge incontinence, and voiding difficulty, linked to detrusor hyperactivity and dyssynergia.
• Two patients presented with frequency and voiding difficulty but lacked urgency, showing an underactive detrusor on urodynamics.
• These two patients did not exhibit involuntary bladder contractions and had voluntary voiding impairment.

Conclusions:

• Voiding dysfunction in HAM is heterogeneous, encompassing both overactive and underactive bladder patterns.
• The underactive detrusor observed in two HAM patients suggests a different pathophysiological mechanism.
• Bladder overactivity may be more prevalent in earlier stages of HAM, while underactivity might emerge later.