Petrenko N. Surgical treatment of benign neoplasms localized at the orbit apex.

This work material is the result of research based on examination of 45 patients with neoplasm localized at the orbit apex. Complete ophthalmologic examination was carried out according to generally accepted methodology, which requires strict examination of visual acuity, pupil function, eyeball mobility, exophthalmoses size, eyeball displacement. KT and MRT examinations were performed as essential (obligatory) in order to determine localization, degree of extension and qualitative characteristic of neoplasm. The method of extracranial lateral orbitotomy (Patent of Ukraine No 33359 А) used to be applied to remove tumors localized at the orbit apex. A new more direct access of surgical intrusion has been developed. 45 patients having been operated this way proved to have minimum after-operation affects (complications). The main criteria of treatment efficiency have been as follows: elimination of disease symptom, improvement of vision acuity and cosmetic effect. The difference in lobes (parts) was eliminated (as the result of extracranial lateral orbitotomy) throughout all symptoms and became to a considerable extent (P<0,01) reliable. The following conclusion (P<0,05 reliable) can be reached here: application of extracranial lateral orbitotomy method for neoplasm's (localized at the orbit top) treatment allows in a number of cases not only to preserve but to improve as well visual functions. The relative organization value in postoperative complication system was used for comparison purposes among different methods of analysis. The results of verbal and theoretical analysis application of the extracranial lateral orbitotomy method efficiency support our statement about its competence. The proposed algorithm for relative system organization calculation in postoperative complication system allows to compare different methods of orbitotomy as for their efficiency.