Imaging Findings

(A) Radiograph of the chest shows ill-defined, multifocal parenchymal opacities bilaterally that are more confluent in the upper lobes. Irregular, elongated tubular densities are better appreciated on the right side (arrow). (B, C) Computed tomography (CT) of the chest with lung window images reveals cylindric bronchiectasis (white arrows) and the irregular tubular structure radiating from the hilar region to the periphery of the right lung (black arrows). Areas of tree-in-bud (TIB) opacity in the periphery of both lungs are also identified

  Differential Diagnosis