Rare Tumors Presenting as a Mastoid Mass

Figure 2

Right postauricular bulging mass which is asymptomatic, hard, and non-movable (a). Temporal bone computed tomography shows a huge, well-demarcated, and bony mass on the right mastoid cortex (b). The intraoperative view of a large bony tumor after elevation of the periosteum (c). The microscopic finding showing areas composed primarily of compact, mature, lamellar bone with organized Harvesian canals (d) (arrows, H&E  × 100).

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