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1. Pathol any substance that passes into and accumulates within cells, tissues, or organs
2. Pathol a local anaesthetic solution injected into the tissues to cause local anaesthesia



an accumulation in bodily tissues of cellular elements admixed with blood and lymph. Inflammatory and tumorous infiltrates occur most often.

An inflammatory infiltrate consists chiefly of polymorphonuclear leukocytes (suppurative infiltrate), erythrocytes (hemorrhagic infiltrate), lymphoid cells (round cell infiltrate), and histiocytes and plasma cells (histiocyte-plasma cell infiltrate). These infiltrates may be resolved, may liquefy, or may undergo sclerosis and form caverns, abscesses, scars, and so forth.

A tumorous infiltrate consists of tumor cells of different kinds (carcinoma, sarcoma); it is a manifestation of the infiltrating growth of a tumor. When an infiltrate forms, the tissue enlarges, changes color, and becomes harder and sometimes painful. In surgical practice, an infiltrate is an induration that develops in tissues when they become saturated with an anesthetic.


References in periodicals archive ?
Interobserver agreement for the traditional reading format of chest X-rays in 137 hospitalized adult patients with CAP Variable Percentage Kappa 95% CI of agreement Alveolar infiltrates 85 0.
Soon afterwards, he was admitted to the ICU with respiratory insufficiency and signs of bilateral alveolar infiltrates on chest X-ray.
Pulmonary hemorrhage with diffuse alveolar infiltrates in men with high volume choriocarcinoma.
Computed tomography (CT) scan of his chest showed multiple pulmonary nodules and alveolar infiltrates with small cavities suggestive of septic infarctions.
Of note on the chest radiograph were right upper lobe alveolar infiltrates.
All hallmarks of the most severe form of acute lung injury, the acute respiratory distress syndrome (ARDS) are present: dyspnoea, refractory hypoxaemia, an inflammatory response, reduced pulmonary compliance and diffuse alveolar infiltrates on chest radiography (2).
The classic chest radiograph reveals bilateral, diffuse alveolar infiltrates consistent with alveolar flooding The absence of cardiomegaly and pleural effusion radiographically distinguishes ARDS from cardiogenic pulmonary edema.
A chest radiograph showed bilateral alveolar infiltrates.
A case was defined as occurring in a patient with bilateral alveolar infiltrates that required intubation and mechanical ventilation.