According to Cancer Research UK, there is no direct connection between autoimmune diseases and cancer. A person with autoimmune disorders is as likely as a normal person to get cancer. However, certain types of cancer are more likely to happen in people with particular autoimmune diseases.
For instance, researchers at the Medical College of Wisconsin have found that systemic sclerosis increased the risks for lung cancer by five times, liver cancer by three times, and nonmelanoma skin cancer by four times (25).
According to a study in Shanghai, the risk of esophageal cancer increased 2.4 fold in patients with autoimmune diseases.