Mesothelioma Minnesota
When the Iron Range miner's group was compared with the cancer registry it showed that there were 58 confirmed cases of malignant mesothelioma cancer which is almost always fatal. Since mesothelioma does not show any symptoms for a long time, cases could be due to asbestos exposure that happened many, many years in the past.
The high rate of this cancer among Iron Range miners was discovered when the Minnesota Department of Health spokesman did a study that was then matched against the Minnesota Cancer Surveillance System which is the state’s cancer registry database.