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Fig. 3B —Chronic interstitial pneumonia in 63-year-old man who previously worked as metal ore miner and who had silicosis. Thin-section CT image obtained 14 years after A reveals increased density and extent of ground-glass opacity and development of reticular opacity. Many tiny cystic spaces can be seen just beneath pleural surface indicating early honeycombing. Honeycomb cysts are obvious in lung base at this time.