Intrathoracic Kidney Etiology: kidney rises into chest before diaphragm closes, or through patent Foramen of Bochdalek, or in traumaImaging: kidney in chestClinical: 5% of renal ectopia Cases of Intrathoracic Kidney CXR AP (upper left) shows a rounded mass in the left lower lobe which appears posterior in location on the CXR lateral (upper right). Coronal and axial CT with contrast of the chest (below) shows the left kidney to be in the lower left hemithorax. In the operating room, a defect at the foramen of Bochdalek was noted and repaired after the kidney had been reduced into the abdomen. CXR PA and lateral (above) shows a soft tissue mass in the posterior costophrenic sulcus. Axial CT with contrast of the chest shows the right kidney in the right hemithorax.