gastrointestinal system disease +

appendix disease +
autoimmune disease of gastrointestinal tract +
diarrhea +
esophageal atresia/tracheoesophageal fistula
gallbladder disease +
gastroenteritis +
gastroesophageal reflux disease
gastrointestinal anthrax +
gastrointestinal system benign neoplasm +
gastrointestinal system cancer +
gastrointestinal tularemia
hepatobiliary disease +
intestinal disease +
juvenile polyposis syndrome
mouth disease +
mucositis
peptic ulcer disease +
perinatal necrotizing enterocolitis
peritonitis +
stomach disease +

achalasia
Barrett's esophagus
dyskinesia of esophagus
esophageal atresia
esophageal cancer +
esophageal candidiasis
esophageal diverticulosis
esophageal leukoplakia
esophageal lipoma
esophageal tuberculosis
esophageal varix
esophagitis +
esophagus carcinoma in situ
esophagus leiomyoma
esophagus squamous cell papilloma
megaesophagus