Which is scarier, lupus or cancer? Lupus and cancer are two different diseases, both of which can cause significant pain and stress to patients. So, which one is scarier, lupus or cancer? This is not a simple question and we need to compare it from different perspectives. Survival rate Whether it is lupus erythematosus or cancer, it has a great impact on the patient\’s survival rate. According to statistics, the cure rate for lupus is much higher than that for cancer. The cure rate for lupus erythematosus is over 80%, while the cure rate for cancer varies depending on the type and stage.