Have you searched already ?https://www.google.com/search?q=asbestos+colon+cancer
provides a large number of studies and reports
My father died age 86 from pleural mesothelioma attributed to occupational exposures. No reference to any abdominal/intestinal pathology.Peritoneal mesothelioma
may be attached to the membranes of the colorectum BUTT is not primary CRC as we know it here.
Please share your findings with the forum