Rare genetic variants linked to familial interstitial pneumonia (FIP)
| Gene | Reported % of FIP | Reference |
| TERT | 8–15% | [20, 21] |
| RTEL1 | 5% | [28] |
| hTR | <1% | [20, 21] |
| DKC1 | <1% | [23, 24] |
| TINF2 | <1% | [25–27] |
| SFTPC | 2–25% | [13–16, 87, 88] |
| SFTPA2 | <1% | [17] |
| ABCA3 | <1% | [18, 19] |
| Unknown | 75–85% |