Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and pulmonary vasculature are unremarkable . There is no pneumothorax or pleural effusion . The lungs are clear . A convex density is noted along the right paraspinal region , and is of unclear etiology .
    OUTPUT:
    
1 . No pneumonia . 2 . Convex opacity along right paraspinal contour just above the right hemidiaphragm . Follow up with non-emergent CT scan is recommended to exclude a posterior mediastinal abnormality .