![]() Generally, osteomas of the temporal bone occur in young individuals and those of the mastoid process are more common in females. She has been regularly followed for 2 years without any signs of regrowth.Įxcluding lesions of the external auditory canal osteomas of the temporal bone are a definite rare occurrences, the commonest site being the squama and the mastoid. Histopathology confirmed an osteoid osteoma. She had an uneventful postoperative period. Finally the edges of the bone were polished with a round burr and the incision closed in layers. This was possible because a plane of spongy bone was found underneath the cortex. There after a Chisel was used to free the tumor from the mastoid. A Stryker saw was used to cut through the periphery of the tumor. After sequential dissection the osteoma was freed of all muscle attachments. A modified post aural incision was given sufficiently behind the groove to expose the tumor completely. She was taken up for excision of the osteoma under general anaesthesia. There were no other osteomas elsewhere in the skull. There was a definite plane of spongy bone at the base of the osteoma. It showed a pedunculated dense osteoma arising from outer cortex of the right mastoid close to the lambdoid suture ( Fig 1). CT scan was done to exclude the presence of any other osteoma within the temporal bones, the skull and sinuses. Clinical diagnosis of osteoma was obvious even though rare, which was confirmed by plain X-ray of the mastoids. There were no bony exostoses in the external ear canal. ![]() Detailed ENT examination including facial nerve function was normal. It was non tender and appeared to be pedunculated. On examination, she was found to have a 2 cm × 2 cm egg shaped hard bony swelling above and behind the right mastoid process fixed to the underlying bone. She did not complain of local pain, earache, headache, deafness, giddiness or any other systemic symptoms. A 16 year-old girl, otherwise otolaryngologically asymptomatic, presented with a swelling behind the right ear that had been growing in size very slowly for the past 5 to 6 years, which had now become unsightly. ![]()
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