The use of the neuronavigator in the orbital surgery of a rare case of Rosai-Dorfman disease.

Neuronavigators are robotic devices that can help to bridge the gap between the data of three-dimensional images and the object by means of interactive computerized programs. A rare case of Rosai-Dorfman disease with prevalent bilateral endo-orbital interest is reported, in which an assisting neuronavigation system was used. The navigation system used is a stereotaxic system without the use of supporting mechanical arms, permitting bi-dimensional and tridimensional reconstruction through the data that are obtained from diagnostic equipment such as computed tomography, magnetic resonance imaging, single photon emission computed tomography, and positron emission tomography. This system has given an accurate localization of the pathological findings and has permitted a precise evaluation of the relation between the lesion and intraconical structures, which are fundamental requisites to optimize the treatment and reduce the postsurgical complications. The exciting results achieved in cerebral parenchyma surgery motivate extension of the use of neuronavigator systems to the splanchnocranial complex.