For the convenience of clinical work and improvement of surgical operation method, protecting vital structure ,improve the safety of the surgical operation, extend the orientation of operation and reduce operation complications in sellar region through single nostril transsphenoidal approach .

Conclusion The sellar region tumor can cause decreased visual acuity,visual field defect,optic atrophy,and eye movement disorders and other clinical manifestations of the eye,for the case of unexplained drop in visual acuity,should be a comprehensive fundus,the field of vision and CT examination,to prevent the sellar region Cancer missed diagnosis,misdiagnosis.

Objective To explore more direct,safe and minimally invasive approach under endoscopy to treat the diseases in sphenoid sinus and sellar area.

Methods: The structures in nasal cavity and sphenoidal sinus were observed and measured in 25 adult cadaveric head specimens and the structures in sphenoidal sinus and sellar area were observed under the operating endoscope in 9 fresh adult cadaveric head specimens.

Methods: The structures in sellar area were observed and measured in 25 adult cadaveric head specimens, and the structures in sphenoidal sinus and sellar area were observed under the operating endoscope in 9 fresh adult cadaveric head specimens.

Study of relationship between sella turcica surface positioning and head position in monoendonasal transsphenoidal pituitary tumor resection;

That eleven patients with sellar germinomas were confirmed by pathological examinations were retros-pectively reviewed.