Two new studies have identified thiopurine drugs as risk factors for non-melanoma skin cancer. The drugs are used to treat inflammatory conditions, including Crohn's disease and inflammatory bowel syndrome (IBS). Thiopurines are also used to treat some forms of cancer. They work by blocking the division of cells. The results indicate that patients taking thiopurine drugs should be vigilant about checking their skin for any new growths or changes in existing skin abnormalities.
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