Diffuse and prominent bronchial wall thickening and tree-in-bud centrilobular nodules within both lungs lower lobes, which are reduced in volume due to partial collapse. Some of the bronchi are fully obliterated by mucous material. The bronchial tree is unremarkable in the remainder of the lobes. Diffuse centrilobular emphysematous changes again noted within the upper lobes. No suspicious mediastinal lymph nodes.