Fig. 3From: Clinical and radiological features of idiopathic interstitial pneumonias (IIPs): a pictorial review“UIP pattern”. A UIP pattern is characterised by all the following features: (1) basal and subpleural predominance (black arrows); (2) reticular pattern (black arrows), with associated traction bronchiectasis (white arrowhead); (3) honeycombing appearance (black dotted arrow); (4) absence of features listed as inconsistent with the UIP patternBack to article page