Introduction Pneumosinus dilatans is characterized by an abnormal dilatation of air-filled paranasal
sinuses. The disease mostly affects men between 20-40 years of age with involvement
of the frontal sinus. The etiology and pathogenesis are largely unclear. The clinical
symptoms can vary and usually manifest as cosmetic, neurological and ophthalmological
symptoms.
Case report We report on a 19-year-old male patient who presented with a slowly progressive frontal
mass that had been present since childhood. Clinically, there was an osseous frontal
asymmetry and protrusion. There were no other symptoms. Computed tomography revealed
an enlargement of the air-filled left frontal sinus without any other recognizable
pathologies. At the patient's request, clinical observation was performed due
to the overall lack of discomfort.
