Fibrohazy densities refer to areas of increased opacity on a chest radiograph that have a fibrous or hazy appearance. These densities are often seen in conditions such as interstitial lung disease or fibrosis, where there is scarring or thickening of the lung tissue. They may indicate inflammation or scarring within the lungs.
A pulmonary infiltrate is a substance denser than air, such as pus, blood, or protein, which lingers within the parenchyma of the lungs. Pulmonary infiltrates are associated with pneumonia, tuberculosis and sarcoidosis.