Dysphagia in Parkinson's disease.

Area of Science:

• Neurology
• Gastroenterology
• Speech-Language Pathology

Background:

• Dysphagia is a significant prognostic factor in Parkinson's disease (PD).
• Dysphagia is often underdiagnosed or overlooked until advanced stages in PD patients.
• Early detection of swallowing dysfunction is crucial for managing PD progression.

Purpose of the Study:

• To assess the prevalence and characteristics of dysphagia in patients with mild to moderate Parkinson's disease.
• To compare videofluoroscopic swallowing examination (VFSE) findings with standard screening methods.
• To investigate the potential for latent swallowing dysfunction in early-stage PD.

Main Methods:

• Recruited 31 patients with mild to moderate Parkinson's disease.
• Utilized videofluoroscopic examination of swallowing (VFSE) to assess all phases of deglutition.
• Compared VFSE results with questionnaire-based screening and other conventional methods.

Main Results:

• Pharyngeal phase dysphagia was detected in 28 out of 31 patients (over 90%).
• Oral phase (19 patients) and esophageal phase (15 patients) dysfunctions were also prevalent.
• Standard screening methods failed to detect significant dysphagia in most patients.
• Latent swallowing dysfunction may be present even in early PD stages.

Conclusions:

• Pharyngeal dysphagia is highly prevalent in mild to moderate Parkinson's disease, often subclinical.
• VFSE is a more sensitive tool for detecting early-stage dysphagia in PD compared to standard screening.
• Swallowing dysfunction might be a prodromal symptom of Parkinson's disease, warranting further investigation in pre-symptomatic phases.