It represent the new phase in the development of endoscopy. Contact endoscopy is a new method for studying disease of the head and neck which clearly shows the cell morphology
Nuclear machine studies Indication: inactive intermittent, small/questionable CFS leak Leaks not revealed by CT cysternography. Detect presence rather than precise localization. Radio isotopes introduced in CSF by Lumbar Puncture /suboccipital
It helps to measure difference aspects of tissue metabolism such as Distribution of blood flow Oxygen utilization Protein synthase It helps to improve the staging of neck. FDG-PET can detect