Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is within normal limits . The mediastinal and hilar contours are stable . The lungs demonstrate diffuse ill - defined patchy opacities . Small bilateral pleural effusions are also present . Clips in the right upper abdomen are compatible with prior cholecystectomy .
    OUTPUT:
    
Diffuse patchy opacities in a cancer patient may represent multifocal pneumonia , pulmonary edema , or widespread metastases . Small bilateral pleural effusions .