Complications of inflammatory diseases of the sinuses.

The great majority of cases of sinusitis are uncomplicated. These infections, however, can result in significant morbidity and often mortality. One must be vigilant in detecting orbital or intracranial spread and iatrogenic injury from surgery because manifestations of these complications can be protean. A good knowledge of the anatomy, the clinical signs, and some key laboratory data is crucial to successful treatment of this challenging disease.