MUCOCELE OF THE SPHENOID SINUS COMPLICATING FIBROUS DYSPLASIA

In this case, the sphenoid sinus was opaque and the floor of the pituitary fossa destroyed with loss of definition of both optic canals. In addition bone sclerosis and thickening due to fibrous dysplasia caused asymmetry of the sphenoid wing and obliterated the left ethmoids and left nasal airway, obscuring some of the features described above. CT scanning provided confirmation of the plain film findings and gave additional information about the extent of the lesion. The destruction of the sphenoid and the optic canals was demonstrated and the displacement of the orbital contents was shown to be due to bone thickening and not to direct invasion of either orbital apex. Nevertheless the exact nature of the destruction could not be diagnosed.