Bronchoscopy revealed multiple papilla-like nodules along the anterolateral wall of the trachea in both patients, which extended to the right main bronchus in the latter patient.

• 气管镜检查发现：第一个病人沿著气管的前外侧壁，有许多颗坚硬的疣状突起，在第二个病人身上相同的突起更延伸到右侧主支气管内。