Pleural Plaques
Pleural plaques are localized areas of calcified fibrous thickening on the pleural membrane caused by asbestos exposure. They are the most common radiographic finding in asbestos-exposed individuals and are not cancerous. However, their presence confirms prior asbestos exposure and signals potential risk for more serious asbestos diseases.
Pleural plaques form when asbestos fibers migrate to the pleural surface and trigger a localized inflammatory and fibrotic response. They typically appear as well-defined areas of thickening on chest X-rays or CT scans, often on the parietal pleura (the outer layer). Most plaques develop 10–30 years after initial exposure.
While pleural plaques themselves rarely cause symptoms or impair lung function, they serve as an important clinical marker. Their presence on imaging confirms a history of asbestos exposure even when the patient does not recall specific exposure events. This is significant for both medical surveillance and legal documentation of exposure.
Patients with pleural plaques should undergo regular monitoring, as the same exposure that caused plaques can lead to mesothelioma, asbestosis, or asbestos-related lung cancer. The plaques themselves do not transform into cancer, but they indicate the level of exposure that puts a person at risk.
- Also known as
- Calcified pleural plaques, Hyaline pleural plaques
- Category
- Medical
- Related terms
- Pleural Thickening, Asbestosis, Pleural Mesothelioma, Occupational Exposure, Latency Period
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