peroral endoscopy
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per·o·ral en·dos·co·py
visual examination of interior sections of the body by introduction of an instrument (for example, an endoscope) through the mouth; examples include esophagoscopy, gastroscopy, and bronchoscopy.
per·o·ral en·dos·co·py
(pĕr-ōrăl en-doskŏ-pē)Visual examination of interior sections of the body by introduction of an instrument (e.g., an endoscope) through the mouth; examples include esophagoscopy, gastroscopy, and bronchoscopy.