ABSTRACT
Fluid in the fetal chest is seen relatively commonly either as a cystic collection or as pleural or pericardial effusion. Cystic collections in the lungs or mediastinum need to be dealt with as chest tumours. Pleural effusion is seen as fluid collection around the compressed lung. Pleural or pericardial effusions may occur simultaneously in some conditions, but usually tend to be independent of each other.
