a1 Departments of Otorhinolaryngology, Royal Bolton Hospital, Nottingham, UK.
a2 Departments of Otorhinolaryngology, University Hospital, Nottingham, UK.
a3 Departments of Otorhinolaryngology, Queen Elizabeth Hospital, Birmingham, University Hospital, Nottingham, UK.
a4 Department of Radiology, University Hospital, Nottingham, UK.
Computed tomography (CT) provides an excellent map for the sinus surgeon aswell as providing information about the extent of disease and the presence of bony destruction. Surgeons need to be aware of the anatomical configuration of the sinuses and the presence of any structural changes such as a dehiscent lamina papyracea, asymmetric skull base, low level of posterior skull base or an Onodi cell, which place the patient at increased risk. Described here is a six-step guide to help the sinus surgeon avoid missing any of the radiologically important features.
(Accepted July 20 1998)
c1 Address for correspondence: Mr N. S. Jones, Department of Otorhinolaryngology – Head and Neck Surgery, University Hospital, Nottingham NG7 2UH.