Esophagus
Additional Resources
Achalasia - OverviewAdam.com defines this disorder and gives its causes, incidense and risk factors.
http://www.nlm.nih.gov/medlineplus/ency/article/000267.htm
Bleeding Esophageal Varices - Overview
Adam.com looks at this disorder and gives a definition, its causes, incidence and risk factors.
http://www.nlm.nih.gov/medlineplus/ency/article/000268.htm