Right paratracheal mass on chest X-ray: an important part of the checklist before cardiac catheterisation.

To cite: Ganju N, Kandoria A, Mahajan K, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2016214448 DESCRIPTION Infrahepatic inferior vena cava (IVC) interruption with azygos continuation is a rare congenital anomaly with a prevalence of 0.6–2.0% in patients with congenital heart disease. Many of these patients are expected to undergo cardiac catheterisation through the femoral vein. For this, the catheter must pass up the IVC to the azygos vein and then down into the superior vena cava (SVC), making the procedure technically more difficult. A 19-year-old male patient with patent ductus arteriosus with severe pulmonary arterial hypertension was subjected to cardiac catheterisation to test the reactivity of the pulmonary vascular bed. Chest X-ray revealed a smooth mass at the right tracheobronchial angle (figure 1). During right heart