gastrointestinal system disease +

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

burning mouth syndrome
herpangina +
lip disease +
oral candidiasis
oral cavity cancer +
oral cavity carcinoma in situ +
oral hairy leukoplakia
oral leukoedema
oral mucosa leukoplakia
oral submucous fibrosis
oral tuberculosis
periodontal disease +
salivary gland disease +
tongue disease +
tooth disease +
Trichomonas tenax trichomoniasis