Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal chest radiograph is markedly rotated to the right side . Thoracic scoliosis also limits the study . Extensive pleural calcifications throughout the right hemithorax are of unknown chronicity . Additionally , a pleural effusion is likely present on the right , but the size is difficult to determine due to positioning . The left lung is clear and there is no pneumothorax . Heart size is not well evaluated due to patient positioning . Superior subluxation of the right glenohumeral joint is noted .
    OUTPUT:
    
1 . Extensive right pleural calcifications of unclear etiology . If prior imaging is available , a direct comparison can be made . 2 . Probable small right pleural effusion .