A Case of Aspergillosis of the Frontal Sinus.

We report an extremely rare case of aspergillosis of the frontal sinus. The patient was a 47-year-old man who presented with the chief complaint of left forehead pain. A nasal examination, CT and MRI suggested mycosis of the frontal sinus. The patient subsequently underwent endoscopic sinus surgery and aspergillosis was diagnosed based on the histopathological findings. Good results were obtained with irrigation of the frontal sinus after surgery. To our knowledge, there have been only four reports of frontal sinus mycosis in Japan, including ours. Aspergillus species was the causative organism in all four cases, and intracranial invasion was present in all of the patients except the one described here.