Most patients with<unk>  have an identifiable, organic cause
Assume malignancy in patients >40yo with new-onset<unk> 
Medications can cause<unk>  from esophageal mucosal injury or reduced lower esophageal sphincter tone.
CVA is most common cause of oropharyngeal<unk>
Dysphagia
Oropharyngeal dysphagia
Gastroparesis
CVA
Dysphonia
Parkinson's disease
Ataxia 
Brain stem tumors