A corridor between middle turbinates and the nasal septum is created and thereafter the nasal septum is detached from the sphenoid rostrum with blunt instruments. Cautery is limited as much as possible. The anterior wall of the sphenoid sinus is widely opened with osteotomes and rongeurs preferably and opening of the sellar floor is performed using chisel and hammer; microdrill with continuous irrigation, to reduce as much as possible the spreading of aerosol and bone dust, is used only to refine skull base opening upon the need.