[Carcinoma of the sphenoid sinus].

The authors describe the case-history of a 63-years-old patient with primary carcinoma of the sphenoid sinus. The tumour penetrated through the lateral wall of the sinus into the intracranium. It was manifested by pain in the left half of the face, Horner's syndrome and paresis of the abducent nerve. The diagnosis was based on the case-history, clinical picture, computed tomography and biopsy. A non-differentiated carcinoma was involved. The authors discuss the reasons of the retarded diagnosis.