2] Biopsies via trans-nasal approach
The other technique for biopsies involves using a flexible endoscope(RZ flexible endoscope with instrumental (internal) side channel, 4.2 mm, Germany) with a working channel through which a small flexible biopsy forceps can be passed(figure 3). After topical anasthesia to the nose and larynx, the scope is advanced to a position with the lesion in view and a 1.8-mm flexible cup biopsy forceps is passed through the working channel by an assistant until visible 1 to 2 cm beyond the tip of the scope. The forceps are then opened and the scope is advanced until the forceps come into contact with the lesion. The forceps are then closed and removed from the scope. The scope can be left in place and multiple biopsies can be taken.