[Mucoceles of the sphenoid sinus].

Based on 5 personal cases, the authors conducted a study of sphenoid mucocele, based notably on the results of CAT-scanning. This is the key step in diagnosis. Indeed, it makes it possible to determine the origin of the mass, and its growth, and lysis or even consolidation of bone walls. Magnetic resonance should supply valuable information on the inflammatory nature of the mass, its relationship with the pituitary and chiasma, as well as the images on a sagittal section. The studies conducted to date in general show a different presentation of the tumors in comparison with mucoceles. Because of the latent character of mucoceles they are often diagnosed at a late stage on signs of local involvement.