Pulmonary infiltrate

Radiologic or clinical finding indicating accumulation of inflammatory, infectious, or neoplastic cellular material, pus, blood, fluid, or protein within the lung parenchyma, producing focal or diffuse opacities on chest imaging. Possible causes are pneumonia, pulmonary edema, hemorrhage, sarcoidosis, lupus, malignancy, medications (chemotherapy, amiodarone) or radiotherapy.