[The clinical characteristics of pediatric external auditory canal keratosis obturans]

Objective: To analyze the clinical characteristics of pediatric external auditory canalkeratosis obturans(KO). Method: Retrospective analyze the clinical data of twenty-three patients were diagnosed with external auditory canal cholesteatoma(EACC). Their chief complaint, the course of the disease, clinical characteristics,CT manifestations,surgical procedure and prognosis were retrospectively analyzed. The clinical characteristics between EACC and KO were compared.Result: Twenty cases(22 ears) were eventually diagnosed as KO. Among them, 2 cases were bilaterally involved. In the remaining unilateral cases, right ear was involved in 11 cases and left ear in 7 cases. All patients complained otalgia(100%). Purulent otorrhea was found in 17 ears(77.3%), and hearing loss withpurulent otorrhea in 3 ears(13.6%). Otoscopic examination found 17 ear with granulation(77.3%).CT scan found deformation of the osseous ear canal and displacement of the tympanic membrane because of compression in 18 ears(81.8%), and the bony canal was absorpt because of pression in 7 cases(38.9%).All patients underwent otoendoscopic operation,and tympanic membrane perforation was found in 4 cases.Postoperative pathologic examination results were keratin epithelial. Conclusion: EACC is easily confused with KO. KO should be considered in the following circumstances: patient who complained of ear pain, ear granulation with purulent discharge, or circinate deformation of the osseous ear canal and displacement of the tympanic membrane in CT scan.