Fig. 2
From: The usual Interstitial pneumonia pattern in autoimmune rheumatic diseases
Radiological ancillary findings in ARDs-related UIP pattern A) Marked honeycombing/reticulation both primarily in the lower lobe. However, a distinct “anterior upper lobe” sign is visible (white arrow) in a patient with RA-UIP. B) “Straight edge” sign with in a patient with polymyositis related UIP pattern. C) Axial image from the same patient as A, both the axial and sagittal images have almost exclusively honeycombing representing the “exuberant honeycombing” sign