Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tiny left apical pneumothorax is stable or slightly improved . The rest of the exam is unchanged with mild pulmonary edema and left middle lung opacity related to recent BAL . Prior sternotomy was done for aortic , mitral and tricuspid valve repair . Moderate cardiomegaly is stable .
    OUTPUT:
    
Left minimal apical pneumothorax is unchanged or slightly improved . The rest of the exam is stable .