Computed tomography of the thorax of a Holstein-Friesian calf with a bronchogenic cyst. Computed tomography of the thorax of a 5-½-month-old female Holstein-Friesian calf with a bronchogenic cyst imaged in dorsal recumbency, transverse view caudal to the heart (image tilted 180°). A regular 2 cm thick wall (arrows) encircles the solitary cavity containing fluid (*) and gas. A multifocal alveolar lung pattern with focal bronchiectasis may be seen in the ventral right and the left caudal lobes. In the dorsal left lung fields, air bronchograms are present within diffuse and mild patchy pulmonary opacities. R right; L left; P dorsal; A ventral.