In fact, it is the accumulation of fluid between the membrane surrounding the lungs and the lung. It can occur for different reasons. It can develop in parallel with the accumulation of fluid in the whole body in cases accompanied by infection, chromosomal disorders or similar conditions, or in cases where the cause cannot be revealed. 

 In fact, it is the accumulation of fluid between the membrane surrounding the lungs and the lung. It can occur for different reasons. It can develop in parallel with the accumulation of fluid in the whole body in cases accompanied by infection, chromosomal disorders or similar conditions, or in cases where the cause cannot be revealed. Sometimes it can also be caused by drainage disorders of the lymphatic system. If it is not accompanied by an additional problem, it may be temporary or persistent. 

 In solitary and persistent situations, the lung(s) may press on and adversely affect lung development. In such cases, the development of the lungs can be prevented from affecting the development of the lungs by placing a catheter-tube in the space where the fluid is collected, while in the mother’s womb and in a timely manner. Detailed evaluation and testing is needed.