Malignant peritoneal mesothelioma can develop in a person when asbestos fibers get inside the peritoneum.  And this can happen if those toxic particles are breathed in, get lodged in the lungs or in the abdominal lining and inside the peritoneum. It is also possible that the asbestos fibers get swallowed rather than inhaled.  This can result in the abdominal lining to swell and later on trigger the initiation of tumor growth.  These tumors may spread inside and beyond the abdominal cavity.

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