Case of the Day - 041 - 2025 05 27 - The "Straight-Edge" Sign 54-years old with Sjogren ILD showing a fibrotic non-specific interstitial pneumonia (fibrotic NSIP) pattern. A "straight-edge" is seen in the coronal and sagittal images. The video explains the origin of the sign and why and how it is useful to identify CTD-ILDs, especially in patients under 60 presenting with a fibrosing ILD for the first time and not known to have connective tissue disease (CTD). YouTube video link https://youtu.be/A2Z2GClnds8 #caseoftheday #ctd #ctdild #straightedge #connectivetissuedisease #sjogren