[Invasion of the orbit in paranasal sinus tumours].

The extension of paranasal sinus cancer into the orbit is one of arguments for carrying out orbital exenteration. Until the advent of high-resolution computed tomography, en bloc radical resection, including the orbit, was the most effective method of treating a cancer, whose size could not be adequately judged before surgery. Patient evaluation with computed tomography (CT) and magnetic resonance imaging (MR) is described. Different clinical situations relating the orbital content to sinus tumour and their management are discussed. Prosthetic options after orbital exenteration are also presented.