They appear as smooth rounded nodules consisting of extremely hard bone covered with normal skin and attached by a broad base to the medial portion of the osseous external auditory canal.

• 它们为光滑的圆形结节，在正常皮肤下包覆著极硬的骨头，而且以宽阔的基底部附著在骨性外耳道的内侧部。