HRCT Pattern | Surgical Lung Biopsy Pattern (When Performed) | Diagnosis of IPF?* | |
---|---|---|---|
UIP | UIP | } | YES |
 | Probable UIP |  |  |
 | Possible IUP |  |  |
 | Nonclassifiable fibrosis †|  |  |
 | Not UIP |  | No |
Possible UIP | UIP | } | YES |
 | Probable UIP |  |  |
 | Possible UIP | } | Probable‡ |
 | Nonclassifiable fibrosis |  |  |
 | Not UIP |  | No |
Inconsistent with UIP | UIP |  | Possible‡ |
 | Probable UIP | } | No |
 | Possible UIP |  |  |
 | Nonclassifiable fibrosis |  |  |
 | Not UIP |  |  |