An aberrant internal carotid artery in the middle ear is a rare otological finding.

摘要之异位内动脉，文献报导极少。

Dehiscence of the floor of the hypotympanum with protrusion of the jugular bulb into the middle ear cavity is a rare otological finding.

摘要静脉球经下鼓室底部骨层裂隙膨入，是一种罕见的血管异常。