In neonates, Bochdalek hernias result in abdominal viscera assuming an intrathoracic position, typically into the left hemithorax. This displacement often impairs growth of the ipsilateral lung, causes mediastinal deviation to the contralateral chest, pulmonary compromise, and pulmonary hypertension. Morgagni hernias also result in abdominal viscera herniation into the chest; however, presenting symptoms more often are related to bowel obstruction. Sliding hiatal (type I) hernias are defined as a supradiaphragmatic displacement of the gastroesophageal (GE) junction. The abnormal anatomy impairs lower esophageal sphincter (LES) function and results in reflux symptoms. Paraesophageal (type II) hernias occur when the gastric fundus assumes a supradiaphragmatic position, whereas the GE junctions remain in its normal anatomical location. Diaphragmatic paralysis may result from any abnormality along the neuromuscular axis. Diaphragmatic tumors are most commonly the result of metastatic tumors originating in surrounding organs.