Selective use of brushing cytology in gastrointestinal strictures.
D000230:Adenocarcinoma / Q000175:diagnosis*; D001706:Biopsy; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis*; D003110:Colonic Neoplasms / Q000175:diagnosis*; D004938:Esophageal Neoplasms / Q000175:diagnosis*; D005336:Fiber Optic Technology; D005770:Gastrointestinal Neoplasms / Q000473:pathology; D005773:Gastroscopy; D006801:Humans; D008722:Methods; D013274:Stomach Neoplasms / Q000175:diagnosis*