Pulmonary infiltrate

A pulmonary infiltrate is a substance denser than air, such as pus, blood, or protein, which lingers within the parenchyma of the lungs.^[1] Pulmonary infiltrates are associated with pneumonia, tuberculosis,^{[citation needed]} and sarcoidosis.^[2]

Pulmonary infiltrates can be observed on a chest radiograph.^{[citation needed]}