Transduodenal endoscopy.
D001706:Biopsy; D004386:Duodenum / Q000473:pathology / Q000601:surgery; D004724:Endoscopy / Q000009:adverse effects; D004947:Esophagus / Q000473:pathology; D005753:Gastric Mucosa / Q000473:pathology; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D006801:Humans; D007583:Jejunum / Q000473:pathology; D008297:Male; D008722:Methods; D008875:Middle Aged