Definition
A naturally occurring fibrous zeolite mineral that, while not technically an asbestos mineral, causes mesothelioma at rates far exceeding those of asbestos. Erionite gained attention following epidemiological studies in the Cappadocia region of Turkey, where villages built from erionite-containing tuff experienced mesothelioma mortality rates up to 50% of all deaths. It has also been found in volcanic rock deposits across the western United States, Mexico, and other regions. The IARC classifies erionite as a Group 1 carcinogen.
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Asbestos
A group of naturally occurring fibrous minerals composed of thin, needle-like fibers. Asbestos was widely used in construction and manufacturing due to its heat resistance, strength, and insulating properties. When disturbed, asbestos releases microscopic fibers that can be inhaled, causing serious health problems including lung cancer, mesothelioma, and asbestosis. All types of asbestos are now recognized as carcinogenic.
Mesothelioma
A rare and aggressive cancer affecting the mesothelium (protective lining of lungs, abdomen, or heart), primarily caused by asbestos exposure. The disease typically develops 20-50 years after exposure, making early detection difficult. Pleural mesothelioma (affecting the lung lining) is the most common form. There is no cure, and prognosis is generally poor, though treatments can extend survival and improve quality of life.
Asbestos Fibers
Microscopic, thin, elongated particles that make up asbestos minerals. These fibers are typically less than 3 micrometers in diameter and can remain airborne for extended periods. When inhaled, they can penetrate deep into the lungs and remain there for years, potentially causing asbestos-related diseases. Fiber counting and identification is essential for exposure assessment and clearance testing.