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Background and Objectives:A nonprogresive and conductive hearing loss in the range of 40 to 60 dB with normal tympanic membrane which has no history of trauma or infection is highly sugestive of a congenital ossicular malformation. Stapes anomaly is the most comon among such osicular anomalies and it is clinically important because hearing loss can be corected who have a normal eardrum. We also analyzed the surgical result with special reference to the patern of ossicular anomaly. Materials and Method:We experienced 28 ears (23 patients) of congenital ossicular anomalies which were confirmed through the exploratory tympanotomy at Ajou University Hospital between September 1994 and December 2001. The preoperative and postoperative audiologic findings, operative findings and CT findings were analyzed. Result:There were 7 paterns of ossicular after ossiculoplasty with several kinds of prosthesis. Conclusion:There was a great diversity of paterns of ossicular anomalies without certain rule. Stapes anomaly was the most comonly detected. Stapes footplate fixation was the most comon type which was usualy bilateral. Anomalies asociated with incus and malleus were usually unilateral. The surgical result of congenital ossicular anomaly was generally good. (Korean J Otolaryngol 2002;45:952-6)