抄録
A case of pneumosinus dilatans and one of pneumocele are reported. These rare entities are characterized by expansion of a paranasal sinus that contains only air.
In a 27-year-old man with intermittent retro-orbital pain and left frontal bossing due to focal expansion of the frontal sinus just to the left of the midline pneumocele was diagnosed. In a 33-year-old man with intermittent headaches and frontal bossing due to enlargement of both frontal sinuses pneumosinus dilatans was diagnosed. The principal difference between pneumosinus dilatans and pneumocele is the presence of focal or generalized bony thinning in the latter entity.
