Transorbital Approach to Surgical Resection of a Far-Lateral Frontal Sinus Osteoma

A 21-year-old male presented with chronic left-sided rhinosinusitis and was found to have a left frontal sinus mass on maxillofacial computed tomography (CT). The mass measured approximately 1.9 × 1.3 × 2.3 cm in size and was contiguous with the intrasinus septum and anterior table of the frontal sinus. Imaging features were consistent with osteoma. An endoscopic endonasal approach resulted in subtotal resection of the mass. Eleven months later, the patient underwent a combined left transorbital and endoscopic surgical resection with oculofacial plastic surgery and otolaryngology. The mass was resected in its entirety, and histopathology confirmed an osteoma. This is one of the few reports of a unilateral transorbital frontal sinus osteoma resection and highlights the utility of the transorbital approach for minimally invasive access to the far-lateral frontal sinus.