INTRODUCTION

Isolated sphenoid sinusitis (SS) is a very rare and potentially life-threatening occurrence. Because of its rarity, its true incidence is difficult to establish, but it lies within the range of 2.7% to 8% based on larger series (1–3). The incidence of isolated fungal disease is even lower. Diagnostically, SS represents a challenge as it does not present in a similar way to inflammation of the other paranasal sinuses, presenting symptoms being generally non-specific (4).