Left-sided congenital diaphragmatic hernia is characterized by a heterogeneous prenatal lesion in the left hemithorax and right mediastinal shift. The heterogeneous mass implies the herniated intestines. The fluid within the mentioned mass and, more importantly, peristalsis assist in differentiating congenital diaphragmatic hernia from other prenatal intrathoracic lesions. The different diagnostic marker of congenital left-sided congenital diaphragmatic hernia is the absence of the stomach in the abdominal cavity. The displaced stomach is usually identified near the left pericardial border or the posterior cardiac space. A homogeneous, hypoechoic mass in the chest, close to the heart, suggests that Doppler sonography can further characterize the herniated liver and the intrahepatic vascular anatomy. Right-sided congenital diaphragmatic hernia is typically suggested by a homogeneous mass in the right chest on imaging studies. The herniated liver may or may not cause the left mediastinal shift. The sonographic appearance of the liver is quite similar to that of the lungs and, therefore, may not serve as a reliable diagnostic marker. The presence of pleural fluid and intestines is another potential characteristic of the right-sided congenital diaphragmatic hernia. The cardiac left shift is a reliable marker for differentiating the right-sided congenital diaphragmatic hernia
