Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 2 .2 cm nodular opacity projecting at the left lung base just superior to the diaphragm . Finding could represent nipple shadow given location , however , underlying pulmonary nodule is not excluded . Recommend repeat with nipple markers . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
2 .2 cm nodular opacity projecting at the left lung base just superior to the diaphragm . Finding could represent nipple shadow given location , however , underlying pulmonary nodule is not excluded . Recommend repeat with nipple markers .