[Planning of variants of endoscopic transnasal access to adenoma of hypophysis].

Results of treatment of 17 patients, operated primarily for adenoma of hypophysis (AH) using endoscopic transnasal access in clinic of transsphenoidal surgery of hypophysis adenoma, were analyzed. Anatomical variants of paranasal cavities (PNC) and preoperative criteria in accordance to the CT data, determining tactics of endoscopic interventions and technical peculiarities of its separate stages are adduced. While comparing MRI data on the stage of preoperative planning and multispiral CT (MSCT) PNC with additional layings of a patient detailed information about their variative anatomy was achieved. Quantitative virtual 3D estimation of PNC anatomy in accordance to MSCT criteria permits to determine individual peculiarities of cranial structure and the changed anatomic ratios, caused by pathological process, and to prevent iatrogenic complications.