Of the bony tumors of the temporal bone, those of the external auditory canal are undoubtedly the most commonly encountered by the otologist. The vast majority of these tumors of the bony canal are small exostoses situated close to the tympanic membrane; they occur either as single or as multiple growths and not infrequently are symmetric and bilateral. Large solitary bony growths occluding to a great extent the lumen of the external canal are, however, relatively infrequent. They are usually immobile, being firmly attached to the bony wall of the canal by a bony pedicle, which varies considerably in size and shape. These growths have been rightfully termed "osteomas" and have been reported by Hellmann,1 Lillie and Williams,2 Bányai and Janota,3 Cocks4 and others. Vail5 recorded an unusual case of multiple large osteoma of both external canals. Very rarely the osteoma has no bony pedicle
DRUSS JG, MAYBAUM JL. OSTEOMA OF THE EXTERNAL AUDITORY CANAL. Arch Otolaryngol. 1942;36(4):499–509. doi:10.1001/archotol.1942.03760040053005
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