Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are normal . Lungs and pleural surfaces are clear . Skeletal structures are remarkable for an expansile lucent lesion involving the right seventh anterolateral rib with similar appearance to previous chest radiograph . No definite new fracture is evident , but subtle fractures may be difficult to detect on conventional chest radiographs .
    OUTPUT:
    
Expansile right lateral seventh rib lesion is similar in appearance to prior radiographs . Considering clinical suspicion for pathologic fracture , dedicated rib radiograph might be helpful to exclude a subtle fracture which may not be detectable on conventional chest radiographs .