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Surgical treatment of anterior skull base tumours.
Acta Neurochirurgica 1997
Skull base tumours represent a special challenge to surgeons due to the complex anatomy of the area. While small tumours are easy to remove, large lesions can pose complex situations. The most difficult aspects are not only the approach and removal, but specially the repair of the defects created by the resection of the tumour. We present here our experience with the surgical removal of tumours on the anterior skull base. To achieve a good approach, we resort to a bifrontal craniotomy including the cilliar arches. To obtain a skull base bone flap that can be used for repair at the end of the procedure, we remove the roof of the nose and a part of the medial wall and roof of both orbits. While the tumour is removed, the skull base bone flap is autoclaved to kill all tumoural cells. At the end of the procedure this bone flap is replaced, wrapped with a flap of pericranium. Provided no orbit needs to be emptied, no other flap is needed to reconstruct the area. One advantage is that the surgical cavity is not occluded with tissues, thus facilitating early identification of any recurrence. The area can be explored with the aid of an endoscope introduced into the nasal cavities through the nostrils, and in case of doubt, biopsies taken from all suspicious area. Our technique facilitates the repair of the surgical defect, and while not compromising the healing process it has a very low incidence of CSF leaks and infections.
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