Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ . There has been no significant interval change . The lungs are clear of focal consolidation . Linear opacity in the right mid lung is again seen , potentially due to scarring . Large hiatal hernia is again seen occupying portion of left hemithorax in the retrocardiac space . Cardiomediastinal silhouette is stable . There are two compression deformities in the lower thoracic / upper lumbar spine , one had been present on prior ; however , there are now two , noting near complete loss of vertebral body height with an acute kyphosis . Post - surgical change is seen at the proximal left humerus as on prior .
    OUTPUT:
    
No acute cardiopulmonary process . New severe compression deformity in the spine , potentially L1 which occurred since ___ .