Contributions of gastrointestinal biopsy to an understanding of gastrointestinal disease.
D000163:Acquired Immunodeficiency Syndrome / Q000473:pathology; D000230:Adenocarcinoma / Q000473:pathology; D001471:Barrett Esophagus / Q000473:pathology; D001706:Biopsy; D003093:Colitis, Ulcerative / Q000473:pathology; D003424:Crohn Disease / Q000473:pathology; D004938:Esophageal Neoplasms / Q000473:pathology; D004942:Esophagitis, Peptic / Q000473:pathology; D005756:Gastritis / Q000473:pathology; D005767:Gastrointestinal Diseases / Q000473:pathology*; D006801:Humans; D013274:Stomach Neoplasms / Q000473:pathology