通常认为中、上鼓室间气体交通径路（即鼓峡）阻塞是造成上鼓室回缩性肛脂瘤（RC》的主要原因。该作者报告术中常可见到通气良好乳突腔。提示即使上鼓室出现＊C，鼓室与乳突间通气径路依然存在。应用高分辨力CT观察了无创伤前提下中耳（尤其是中、上鼓室间）交通情况与气化状态 It is generally believed that the middle and upper drum chamber gas traffic path (ie drum gorge) blockage is caused by the upper tympanic aneurysm (RC "). The authors report the surgery can often see the well-ventilated mastoid. Tip even the upper tympanic cavity Appeared * C, tympanic and mastoid between the ventilation path still exists.Using high-resolution CT under non-invasive conditions observed in the middle ear (especially the middle and upper tympanic compartment) traffic conditions and gasification status