International Session 31 　　Otology-Examination and Research

Background: Ossifying fibroma is a rare benign tumor of fibroosseous origin typically found in the mandible and maxilla.Its presence in the external auditory canal is extremely rare presenting diagnostic and therapeutic challenges due to proximity to vital structures and potential recurrence.Case: A 21 years old woman presented with left otalgia, intermittent ear discharge, reduced hearing, and occasional tinnitus over 10 months.Examination revealed a mass in the left external auditory canal, obscuring the tympanic membrane.Audiometry showed left moderate to severe mixed hearing loss.CT imaging identified a sclerotic lesion(1 2 1 9 1 9 cm)occluding the left ear canal.The mass was excised via endaural canalplasty with intraoperative findings confirming a bony mass near the tympanic membrane.Histopathology confirmed ossifying fibroma.Recurrence occurred one month postoperatively necessitating plans for further surgery and hearing rehabilitation.Conclusion: Ossifying fibroma of the external auditory canal is rare and challenging to manage.Surgical excision is the primary treatment, but vigilant long term follow up is essential to address recurrences.