Orbital tumors

Abstract

Orbit can be home for a spectrum of tumors with almost every orbital structure having the potential to harbor a neoplastic process. Surgical exposure and resection of orbital tumors can often be tricky due to the intricate anatomy of the region, with an additional complexity caused by a tumor related distortion. The clinical presentation depends on the primary structure involved and the location of the tumor within the orbit, and so does the scheme of management. Modern diagnostic imaging modalities offer a crucial pre-operative understanding of the precise location of the tumor within the orbit; it also helps in defining the nature of the tumor. Both these aspects are required for planning the appropriate surgical approach. Often, orbital tumors extend beyond the confines of the orbit requiring the tailoring of the surgical procedure, which may necessitate the involvement of a multidisciplinary team. The contemporary neurosurgical practice is also witnessing a progressive inclination towards minimally invasive endoscopic approaches, which have shown equally good if not better results in properly selected cases. Furthermore, early promising results with attempts at performing multisession stereotactic radiosurgery on orbital tumors has rekindled interest in this modality, in line with the management of intra-cranial tumors having a similar pathology. This article aims to recapitulate relevant surgical anatomy and to elucidate the current practice in the management of common orbital tumors encountered by neurosurgeons.