Pneumosinus dilatans of the sphenoid sinus presenting with visual loss

Objective: To report 3 cases of pneumosinus dilatans of the sphenoid sinus associated with visual loss. Materials and Methods: Retrospective case ser ies describing history of vis ual loss, visual examination, visual field deficits, and radiologic imaging . Results: Three patients developed visual loss associated with pneumosinus d ilatans of the sphenoid sinus. Conclusions: Pneumosinus dilatans of the sphenoid sinus is a rare disorder that should he considered in patients presenting with unexplained visual lo ss.