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Figure 4a. IPF in a 64-year-old man. (a) High-resolution CT image obtained at presentation shows reticular opacities, honeycombing (arrowhead), and focal ground-glass opacity (thick arrow). Moderate traction bronchiectasis is present (thin arrow). These findings are consistent with the UIP pattern. (b) Follow-up CT image obtained 12 months later shows marked progression of the honeycombing (arrowheads) and traction bronchiectasis (arrows).