Adenocarcinoma of the sphenoid sinus. Case report.

We report a rare case of adenocarcinoma of the sphenoid sinus in which the very rarity of the site made for considerable uncertainty in the early diagnosis despite major neurological deficits at onset. Only the subsequent course of the tumor enabled us to identify the site in the sphenoid sinus, an atypical area surrounded by numerous neurovascular structures which, if involved, may give rise to a protean and nonspecific symptom-complex.