Pneumosinus dilatans

Pneumosinus dilatans is a rare disease in which one or more paranasal sinuses expand, or dilate, abnormally. It most often affects the frontal sinus, and can cause damage to vision due to pressure on the nearby optic nerve. The preferred treatment is endoscopic surgery to deflate the sinus.

Sources

• Hsu et al., Wen-Ming. "Pneumosinus dilatans Associated with Orbital Neurilemmoma", Chinese Medical Journal, 2002. Retrieved on 2006-06-28. 

• Carta et al., A.. "Neuro-ophthalmological presentation of pneumosinus dilatans", Neuro-Ophthalmology, June 1999. Retrieved on 2006-06-28.