Osteoma of the Middle Ear: Report of a Case

Osteoma of the Promontory: A Case Report

“…The origin of the osteoma in our patient, as well as that reported by Yamasoba et al [3] and the second patient of Silver et al [2], may have been an inflammatory reaction of the periosteum [4], However, another case described in the literature [5] presented no history of otitis media. The fact that familial cases have been reported [6] and the increased frequency of onset in those regions that, not being covered by mucosa, are not susceptible to infections (temporal squama, the internal auditory canal, the pe trous apex and the styloid process), but are susceptible to injury, seems to indicate that there must be more than one cause for the development of osteomas.…”

“…Thomas [6] describes the case of 2 brothers with localization in the pyramidal eminence, coinciding with the location of that reported by Yamasoba et al [3]; other sites are the fallopian tube, the footplate [7], the pro montory [2,5,8], the lateral semicircular canal [9] and the incus [ 10]. The osteoma of our patient was situated in the bone over the basal turn of the cochlea and had no contact with the ossicles.…”

Osteoma Presenting as a Painless Solitary Mastoid Swelling

“…Amongst parts of the temporal bone, the external auditory canal is the most common location for osteomas, followed by the mastoid and the temporal squama [7]. The etiology of osteoma is unknown, but there is some evidence to suggest a congenital origin [8]. Embryogenesis and metaplasia following recurrent local irritation and trauma are the most commonly accepted theories for occurrence of osteoma.…”

Osteoma of the Mastoid Bone - A Case Report

“…There is some evidence that osteomas are of congenital nature [1]. The most widely accepted theories for the etiopathogenesis of osteomas include embryogenesis and metaplasia following recurrent local irritation and trauma.…”