Table 2.
Diagnosis of idiopathic pulmonary fibrosis.
| HRCT FEATURE | HISTOPATHOLOGICAL FEATURE | |
|---|---|---|
| Definite IPF | UIP | No biopsy |
| UIP | ||
| Probable UIP | ||
| Possible UIP | ||
| Nonclassifiable fibrosis | ||
| Possible UIP | UIP | |
| Probable UIP | ||
| Probable UIP | Possible UIP | Possible UIP |
| Nonclassifiable fibrosis | ||
| Possible UIP | Inconsistent UIP | UIP |
| Not UIP | UIP | Not UIP |
| Possible UIP | Not UIP | |
| Inconsistent UIP | Probable UIP | |
| Possible UIP | ||
| Nonclassifiable fibrosis | ||
| Not UIP |
Note: The HRCT criteria for UIP are listed in Table 1. A diagnosis of IPF is made when the HRCT feature is associated with one histopathological feature.
Abbreviations: HRCT, high-resolution computed tomography; IPF, idiopathic pulmonary fibrosis; UIP, usual interstitial pneumonia pattern.