Mesothelioma Incidence-Although reported incidence rates have increased in the last 20 years, mesothelioma is still a relatively rare cancer. Incidence rate is approximately one per 1,000,000. The highest incidence was found in Britain, Australia and Belgium: 30 per 1,000,000 per year. For comparison, populations with high levels of smoking can have a lung cancer incidence of over 1,000 per 1,000,000. The incidence of malignant mesothelioma currently ranges from about 7 to 40 per 1,000,000 in industrialized Western nations, depending on the amount of asbestos exposure of the population over the last few decades. It has been estimated that incidence may have peaked at 15 per 1,000,000 in the United States in 2004. The incident is expected to continue increasing in other parts of the world. Mesothelioma occurs more often in men than in women and risk increases with age, but this disease can appear either men or women at any age. Approximately one-fifth to one third of all mesotheliomas are peritoneal.
Between 1940 and 1979, approximately 27.5 million people are occupationally exposed to asbestos in the United States. Between 1973 and 1984, there has been a threefold increase in the diagnosis of pleural mesothelioma in Caucasian men. From 1980 until the late 1990s, the death rate from mesothelioma in the USA increased from 2,000 per year to 3,000, with men four times more likely to get it than women. This figure is probably inaccurate, because it may be that many cases of mesothelioma are misdiagnosed as adenocarcinoma of the lung, which is difficult to differentiate from mesothelioma.
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