Fig. 4.

Kaplan–Meier survival curves for the groups with the most caudal extent of PPFE-like lesions in (a) all cases, (b) IPF, and (c) IP without IPF and PPFE. The group without PPFE-likelesions (solid line), that of the area above the level of the sternoclavicular joint (dotted line), that of the area of above the level of the aortic arch (short dashed line), that of the area below the level of the aortic arch and above the level of the carina (dashed and dotted line), and that of the area below the level of the carina (long dashed line) were shown.