Consider tracheal/lung aspiration  of foreign body
Oropharyngeal dysphagia
CVA
Parkinson's disease
Brain stem tumors
Degenerative disease - ALS, MS, Huntington's
Postinfectious - polio, syphilis
Peripheral neuropathy
Myasthenia gravis
Polymyositis, dermatomyositis
Muscular dystrophy
Esophageal dysphagia
Achalasia
Diffuse esophageal spasm<unk> 
Esophageal web
Malignancy, mediastinal masses
Schatzki Ring
Scleroderma
Strictures - peptic, radiation, chemical, medication-induced
Vascular compression
Zenker's diverticulum
CVA
Parkinson's disease
Brain stem tumors
Degenerative disease - ALS, MS, Huntington's
Postinfectious - polio, syphilis
Peripheral neuropathy
Myasthenia gravis
Polymyositis, dermatomyositis
Muscular dystrophy
Achalasia
Diffuse esophageal spasm<unk> 
Esophageal web
Malignancy, mediastinal masses
Schatzki Ring
Scleroderma
Strictures - peptic, radiation, chemical, medication-induced
Vascular compression
Zenker's diverticulum
<2mo
Swallowed maternal blood (from chapped nipples)
Stress ulcer
Vascular malformation
Hemorrhagic disease of newborn (vitamin K deficiency)
Coagulopathy/bleeding diathesis
Swallowed maternal blood (from chapped nipples)
Stress ulcer
Vascular malformation
Hemorrhagic disease of newborn (vitamin K deficiency)
Coagulopathy/bleeding diathesis
2mo–2yr
Gastroenteritis
Toxic ingestion
Mallory-Weiss tear
Vascular malformation
Esophagitis
Stress ulcer
Coagulopathy/bleeding diathesis
GI duplication<unk> 
Gastroenteritis
Toxic ingestion
Mallory-Weiss tear
Vascular malformation
Esophagitis
Stress ulcer
Coagulopathy/bleeding diathesis
GI duplication<unk> 
>2yr
Gastroenteritis
Mallory-Weiss tear
Peptic ulcer disease
Toxic ingestion
Vascular malformation
Gastritis
Varices
Hemobilia<unk> 
Gastroenteritis
Mallory-Weiss tear
Peptic ulcer disease
Toxic ingestion
Vascular malformation
Gastritis
Varices
Hemobilia<unk>
Ingested foreign body
Consider tracheal/lung aspiration  of foreign body
Aspirated foreign body
Oropharyngeal dysphagia
Soft tissue foreign body
CVA
Infected G-tube
Parkinson's disease