Table 3:
Imaging findings of CXPA
| Total | Invasive | Noninvasive | P Value | OR 95% CI | |
|---|---|---|---|---|---|
| Border | |||||
| Totally ill-defined | 2 | 2 | 0 | .002 | 14.41 (2.23–171.2)a |
| Partially ill-defined | 19 | 17 | 2 | ||
| Well-defined | 16 | 6 | 10 | ||
| Capsule | |||||
| None | 9 | 9 | 0 | <.001 | 38.18 (4.06–1956.7)b |
| Partial | 12 | 11 | 1 | ||
| Total | 16 | 5 | 11 | ||
| Corona sign on FS-T2WI | |||||
| Present | 21 | 19 | 2 | .001 | 14.40 (2.23–171.2) |
| Absent | 16 | 6 | 10 | ||
| Corona sign on CE-FS-T1WIc | |||||
| Present | 22 | 19 | 3 | .007 | 9.31 (1.55–76.4) |
| Absent | 13 | 5 | 8 | ||
| Black ring sign | |||||
| Present | 15 | 14 | 1 | .011 | 13.11 (1.49–642.2) |
| Absent | 22 | 11 | 11 |
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.