Special Procedures

Abstract

The initial radiological investigation of the paranasal sinuses is by the techniques described in Chap. 1. If the appearances on plain radiography are consistent with allergic or inflammatory disease and there is good correlation of the clinical findings, no further investigation is usually necessary. If, however, the evidence from plain radiography indicates an expanding or destructive lesion of the sinus walls or a tumour mass, and the clinical findings suggest a less benign process (for example pain and paraesthesia, epistaxis, facial swelling, nasal mass or orbital involvement), tomographic investigation is indicated. There are now three tomographic techniques available.