Miliary opacities (lungs)
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The term miliary opacities refers to innumerable, small 1-4 mm pulmonary nodules scattered throughout the lungs. It is useful to divide these patients into those who are febrile and those who are not.
Additionally, some miliary opacities are very dense, narrowing the differential - see multiple small hyperdense pulmonary nodules.
Pathology
Aetiology
The causes can be broadly sub grouped dependent on whether or not the patient is febrile.
Afebrile
- infection
- tuberculosis (often febrile but may be afebrile) - miliary tuberculosis
-
fungal (often febrile)
- immunocompromised or elderly patients may be afebrile
- healed varicella pneumonia
- metastases - miliary metastases
- sarcoidosis
- pneumoconioses
- pulmonary haemosiderosis
- hypersensitivity pneumonitis
- Langerhans cell histiocytosis (LCH)
- multifocal micronodular pneumocyte hyperplasia (MMPH)
-
pulmonary alveolar proteinosis
- small acinar opacities can mimic a miliary pattern 6
Febrile
- infection
- hypersensitivity pneumonitis (mild fever if any)
Etymology
The term miliary stems from millet seed, a term used to describe a group of small-seeded species of cereal crops or grains, widely grown around the world for food and fodder 5.
See also
-<p>The term <strong>miliary opacities</strong> refers to innumerable, small 1-4 mm <a href="/articles/pulmonary-nodule-1">pulmonary nodules</a> scattered throughout the <a title="Lungs" href="/articles/lung">lungs</a>. It is useful to divide these patients into those who are febrile and those who are not.</p><p>Additionally, some miliary opacities are very dense, narrowing the differential - see <a href="/articles/diffuse-hyperdense-small-pulmonary-nodules">multiple small hyperdense pulmonary nodules</a>. </p><h4>Pathology</h4><h5>Aetiology</h5><p>The causes can be broadly sub grouped dependent on whether or not the patient is febrile.</p><h6>Afebrile</h6><ul>- +<p>The term <strong>miliary opacities</strong> refers to innumerable, small 1-4 mm <a href="/articles/pulmonary-nodule-1">pulmonary nodules</a> scattered throughout the <a href="/articles/lung">lungs</a>. It is useful to divide these patients into those who are febrile and those who are not.</p><p>Additionally, some miliary opacities are very dense, narrowing the differential - see <a href="/articles/diffuse-hyperdense-small-pulmonary-nodules">multiple small hyperdense pulmonary nodules</a>. </p><h4>Pathology</h4><h5>Aetiology</h5><p>The causes can be broadly sub grouped dependent on whether or not the patient is febrile.</p><h6>Afebrile</h6><ul>
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Image 12 X-ray (Frontal) ( create )
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