Is Dysphagia in Multiple System Atrophy Responsive to Levodopa? Results from a Retrospective Study

Area of Science:

• Neurology
• Gastroenterology

Background:

• Dysphagia is a significant clinical issue in multiple system atrophy (MSA).
• Current treatment options for MSA-related dysphagia are limited.

Purpose of the Study:

• To systematically evaluate the responsiveness of dysphagia to levodopa treatment in patients with MSA.
• To compare swallowing function before and after levodopa administration.

Main Methods:

• 19 patients with MSA underwent endoscopic swallowing evaluations (FEES).
• Evaluations were conducted in both levodopa 'Off' and 'On' states using an adapted protocol.
• Findings were compared between states and correlated with disease and demographic factors.

Main Results:

• Levodopa response for motor impairment was poor in MSA patients.
• Dysphagia severity varied, with some patients showing marked improvement in leaking and aspiration, while most remained unchanged or worsened.
• Reduced severity of leaking was observed, but pharyngeal residue, penetration, and aspiration largely remained unchanged.
• Irregular arytenoid cartilage movements (iACM) were prevalent in all patients, irrespective of levodopa status.

Conclusions:

• Levodopa response in MSA-related dysphagia is highly variable.
• Individual patient assessments are crucial for tailoring dysphagia therapies in MSA.
• Further investigation into non-pharmacological interventions for MSA dysphagia is warranted.
• Irregular arytenoid cartilage movements (iACM) are a common finding in MSA.