Figure 3c. PVOD in a 17-year-old girl. (a) Coronal reformatted CT scan (lung window level) reveals widespread septal lines (arrowheads) and diffuse, ill-defined ground-glass nodules (arrows). (b) Photograph of a cut coronal section of the right lung reveals septal prominence (curved arrow) and ill-defined reddish-tan parenchymal nodules (straight arrow). (c) Axial CT image (mediastinal window level) reveals a thickened anterior wall of the right ventricle (curved arrow), a straightened interventricular septum (straight arrow), and a dilated right atrium compatible with cor pulmonale.