abdominal bloating
abdominal pain
abnormal amylase blood test
abnormal bowel movement
achalasia
anal pain
anorectal manometry
anorectal stenosis
barrett's esophagus
benign neoplasm of colon
bile duct biopsy
bile duct occlusion
bile duct stone
biliary atresia
biliary dyskinesia
bleeding hemorrhoids
bowel dysmotility
bravo ph test
bright red blood per rectum
cholangioscopy
cholangitis
cholecystitis
choledochal cyst
cholelithiasis
clostridium difficile
