title: Endoscopic gastrointestinal evaluation. With convertible lens system and biopsy channel equipped panendoscope.
mesh_terms: D001706:Biopsy; D005069:Evaluation Studies as Topic; D005336:Fiber Optic Technology; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D020699:Gastroscopes; D006801:Humans; D013274:Stomach Neoplasms / Q000175:diagnosis*