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Removal of frontal sinus keratoma solely via endoscopic sinus surgery

  • J-C Lai (a1), C-K Liu (a2), M-L Chen (a3) and M-K Chen (a1) (a4)



To present a patient with a frontal sinus keratoma removed solely via endoscopic sinus surgery, including presentation of characteristic computed tomography and magnetic resonance images; to discuss the differential diagnosis of this condition; and to report the current knowledge on and treatment of frontal sinus keratoma.

Case report:

A 53-year-old man presented to our department with a 10-month history of rhinorrhoea and postnasal drip. After computed tomography and magnetic resonance imaging studies, the patient underwent surgery utilising a modified Lothrop procedure. An extensive soft tissue lesion was removed from the frontal sinus. Histological examination revealed a lamellated cluster of keratinous material. The pathological diagnosis was keratoma of the frontal sinus. There was no recurrence of keratoma over a two-year follow-up period.


Following review of the English language literature, we believe this case report to represent the first successful application of a modified endoscopic Lothrop procedure for resection of an extensive frontal sinus keratoma. Thus, the applications of endoscopic sinus surgery may be expanded to include frontal sinus keratoma removal.


Corresponding author

Address for correspondence: Dr Mu-Kuan Chen, Chief, Department of Otorhinolaryngology, Head and Neck Surgery, Changhua Christian Hospital, 135 Nanhsiau Street, Changhua, 500, Taiwan. E-mail:


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Removal of frontal sinus keratoma solely via endoscopic sinus surgery

  • J-C Lai (a1), C-K Liu (a2), M-L Chen (a3) and M-K Chen (a1) (a4)


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