Table 3:

Imaging findings of CXPA

TotalInvasiveNoninvasiveP ValueOR 95% CI
Border
 Totally ill-defined220.00214.41 (2.23–171.2)a
 Partially ill-defined19172
 Well-defined16610
Capsule
 None990<.00138.18 (4.06–1956.7)b
 Partial12111
 Total16511
Corona sign on FS-T2WI
 Present21192.00114.40 (2.23–171.2)
 Absent16610
Corona sign on CE-FS-T1WIc
 Present22193.0079.31 (1.55–76.4)
 Absent1358
Black ring sign
 Present15141.01113.11 (1.49–642.2)
 Absent221111

  • ↵a These ORs and 95% CIs were calculated between the 2 groups as well-defined versus totally ill-defined and partially ill-defined.

  • ↵b These ORs and 95% CIs were calculated between the 2 groups as none and partial versus total.

  • ↵c Two cases lacked contrast-enhanced images.