Conformal three-dimensional photon radiotherapy for paranasal sinus tumors

Background: Tumors in the nasal cavity and paranasal sinus are difficult to treat with radiotherapy. Usually, in addition to a two- or three-field photon technique, an interorbital electron field is required. This may result, however, in severe over or underdosage, the latter being especially detrimental when occurring in the main tumor bulk. Methods and results: We present a conformal three-dimensional treatment technique that provides sufficient interorbital dose with photons only while sparing the eyes, optic nerves and chiasm, and may be considered for selected tumors in this region. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.