Pneumosinus Dilatans – A Rare Disorder Of Paranasal Sinuses

Pneumosinus dilatans is a very rare disorder of the paranasal sinuses, most commonly affecting the frontalsinuses (Pneumosinus dilatans frontalis). So far only 134 cases are reported in the literature. The exact etiologyof this disorder is unknown. The pathology causes abnormal dilatation of paranasal sinuses. Most patients areasymptomatic while others can have clinical features of frontal bossing, head ache, visual defects etc. Thediagnosis is by computed tomographic imaging. We here report a case of pneumosinus dilatans frontalis in a 22year old male patient presented with nasal obstruction.