Modern endoscopic imaging techniques make it possible to detect tumor diseases of the upper respiratory and digestive tract and treat them minimally invasive - with a good oncologic outcome and maintaining the functionality of the tissue.Horizontal techniques permit the inspection of big mucous membrane surfaces, searching vor areas suspicious of dysplasia or tumor. They can be used as screening techniques. Vertical techniques serve for precise examination of in-depth expansion, infiltration chraracteristics and dignity of known lesions. Cellular techniques deal with the detection of cellular changes in vivo. As the techniques have different advantages and disandvantages, it is recommended to combine several techniques for best diagnostic gains.
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