The examination of a bodily orifice, canal or organ using an endoscope(noun)
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Use "endoscopy" in a sentence
"A research team lead by Professor Peter Malfertheiner, evaluated prospectively the changes in quality of life (QOL) in ten HV during a long-term endoscopy-based study."
"Wakefield, on the other hand, was anything but discouraging: He suggested that Michelle have a pediatric gastroenterologist perform an endoscopy, which is an invasive surgical procedure during which a fiber-optic camera is threaded up the rectum or down the mouth and through the maze of the gastrointestinal tract."
"Screening for esophageal cancer, called endoscopy, involves placing a tube with a small camera down the throat to look for tumors."