Fig. 4From: Solitary sphenoid sinus benign lesions: management and prognostic values as retrospective audit of seven case seriesCase 4. Spheno-choanal polyp. CT scan axial view (A left) showing a right sphenoid sinus mass with posterior ethmoidal cell’s retention. Sagittal view (B right) showing a sphenoid sinus’s well-defined mass expanded to the rhinopharynx suggesting a spheno-choanal polypBack to article page