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The case of a 2-year-old boy with a right middle ear lipoma and a concomitant chondroma of the left external auditory canal is presented. The patient's preoperative diagnosis was cholesteatomas of the right middle ear and left external ear canal. A right-sided epitympanotomy was performed. A lump of fatty tissue in the right anterior middle ear cleft that obstructed the Eustachian tube orifice was found. The white mass in the left external auditory canal, which easily separated from the tympanosquamous fissure of the temporal bone, was excised with a Rosen needle. Histopathologic examination revealed a lipoma of the right middle ear and a chondroma of the external ear canal. No cases of concomitant lipoma and chondroma have been previously reported. In the present case, the middle ear lipoma could be classified as a congenital anomaly because of its association with a contralateral side chondroma, which would be a choristoma. 2 Case report The patient was a 2-year-old boy with no complaints who was evaluated by a local otolaryngologist because of right- sided otitis media with effusion. A right-sided myringotomy was performed twice. A yellowish-white mass was observed in the right middle ear at the time of the treatment for the otitis media. The mass did not change in size, form, or color during the course of treatment. The doctor also discovered a white mass in the left external auditory canal, which was suspected to be a congenital cholesteatoma. The patient was referred to our hospital for further evaluation.

A Case of a Child with a Lipoma of the Middle Ear and a Concomitant Chondroma of the External Auditory Canal