An unusual presentation of a giant frontal sinus mucocele manifesting with a subcutaneous forehead mass.

INTRODUCTION To describe the unusual manifestation of a giant frontal sinus mucocele. CLINICAL PICTURE A 33-year-old female presented with blurring of vision in the left eye, periorbital swelling and a painless forehead mass. There was proptosis, partial ptosis, and an elongated, soft, subcutaneous mass over the left side of the forehead. CT scan showed a mass arising from the frontal sinus with both intraorbital and intracranial extension. TREATMENT Surgical excision of the mass confirmed the diagnosis of a mucocele. OUTCOME Postoperatively, the patient was asymptomatic. CONCLUSIONS A subcutaneous soft-tissue mass may be the presenting complaint of a frontal mucocele. Careful examination of the surrounding skin may suggest the diagnosis of sinus-related disease and thus direct appropriate investigations.