Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A moderate to large left pleural effusion has developed from ___ to the ___ post median sternotomy . The median sternotomy wires are stable in position . Fluid is seen in the minor and major oblique fissures . Cardiomegaly is stable . There are degenerative changes in the bilateral shoulders .
    OUTPUT:
    
A moderate to large left pleural effusion ( post median sternotomy ) has developed from ___ to the ___ suggesting post pericardial syndrome .