Frontal sinus mucocele with intracranial and intraorbital extension

introduction: frontal sinus mucoceles can present with a multitude of different symptoms including ophthalmic disturbances. even benign, they have a tendency to expand by eroding the surrounding bony walls that displaces and destroys structures by pressure and bony resorption. case report: a 32-year-old man with diplopia, proptosis of the right eye and headache was presented. the diagnosis was frontal sinus mucocele with intracranial and intraorbital extension. possible clinical manifestations of mucoceles, diagnostic imaging techniques and treatment used are discussed. conclusion: frontal mucoceles are benign and curable, early recognition and management of them is of paramount importance, because they can cause local, orbital or intracranial complications.