Difficulty swallowing
Sensation of food stuck
Chest pain<unk>  categories
Oropharyngeal<unk>  - difficulty initiating swallowing (coughing, chocking, nasal regurgitation)
Esophageal<unk> 
Mechanical obstruction - usually solid food only
Neuromuscular disorder - solid or liquid food
Oropharyngeal<unk>  - difficulty initiating swallowing (coughing, chocking, nasal regurgitation)
Esophageal<unk> 
Mechanical obstruction - usually solid food only
Neuromuscular disorder - solid or liquid food
Mechanical obstruction - usually solid food only
Neuromuscular disorder - solid or liquid food

Discoordination in transferring bolus from pharynx to esophagus
Etiology
Neuromuscular disease (80% of cases)
CVA, scleroderma, myasthenia gravis, Parkinson's, botulism, lead poisoning
Localized disease
Pharyngitis, aphthous ulcers, PTA, Zenker diverticulum
Symptoms
Gagging, coughing, inability to initiate swallow, need for repeated swallows
Neuromuscular disease (80% of cases)
CVA, scleroderma, myasthenia gravis, Parkinson's, botulism, lead poisoning
Localized disease
Pharyngitis, aphthous ulcers, PTA, Zenker diverticulum
CVA, scleroderma, myasthenia gravis, Parkinson's, botulism, lead poisoning
Pharyngitis, aphthous ulcers, PTA, Zenker diverticulum
Gagging, coughing, inability to initiate swallow, need for repeated swallows
Improper transfer of bolus from upper esophagus into stomach
Etiology
Obstructive disease (85% of cases)
Foreign body, carcinoma, webs, strictures, thyroid enlargement
Motor disorder
Achalasia, peristaltic dysfunction (nutcracker esophagus), scleroderma
Symptoms
Food "sticking," retrosternal fullness with solids (and eventually liquids), odynophagia
Obstructive disease (85% of cases)
Foreign body, carcinoma, webs, strictures, thyroid enlargement
Motor disorder
Achalasia, peristaltic dysfunction (nutcracker esophagus), scleroderma
Foreign body, carcinoma, webs, strictures, thyroid enlargement
Achalasia, peristaltic dysfunction (nutcracker esophagus), scleroderma
Food "sticking," retrosternal fullness with solids (and eventually liquids), odynophagia
Dysphagia
Oropharyngeal dysphagia
Gastroparesis
CVA
Dysphonia
Parkinson's disease
Ataxia 
Brain stem tumors