Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild vascular crowding , particularly at the right lung base . There is no focal consolidation or pleural effusion . The heart and mediastinum are within normal limits . There is no pneumothorax . Old healed left rib fractures are identified . There is no evidence of an acute rib fracture . No soft tissue abnormality is identified .
    OUTPUT:
    
Grossly clear lungs . Etiology of right chest wall pain not elucidated .