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Cancer screening means looking for cancer before symptoms appear, when cancer may be easier to treat.
The endoscopy procedure uses an endoscope to examine the interior of a hollow organ or cavity of the body.
Biopsy is done to confirm the presence and type of cancer. It is often done as an out- patient procedure.
Direct laryngoscopy is the use of the laryngoscope to visualise the vocal cords (larynx) under direct vision