Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . Moderate to severe degenerative changes of the left shoulder are not well assessed on this study . There appears to be joint space narrowing , marginal sclerosis , and hypertrophic changes at the inferior glenohumeral joint .
    OUTPUT:
    
No acute cardiopulmonary process . Moderate to severe degenerative changes of the left shoulder . .