This photograph shows the histopathology of an osteoma, arising in the external auditory canal. Unlike exostoses, an osteoma is a true benign tumor of bone. Histologically, an osteoma consists of cancellous bone as opposed to the ivory like dense bone seen in an exostosis.
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![Osteoma of the External Canal [histology]](https://medtube.net/images/min/5819c45e79535e3e21b2facf63f58fef/750/750/3)
![Osteoma of the External Canal [histology]](https://medtube.net/images/min/5819c45e79535e3e21b2facf63f58fef/120/120/3)
![External Auditory Canal Junction [the Isthmus]](https://medtube.net/images/min/ed89ef2b09553cecbd7125f5b3fd1867/115/70/1 "External Auditory Canal Junction [the Isthmus]")
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