Melanoma and Non Melanoma Skin Cancer Awareness: Know the Difference Skin cancer is the most common form of cancer worldwide; but not all skin cancers are the same. Please swipe and read through Symptoms of non melanoma skin cancer NHS Figure 1 from Nonmelanoma skin cancer. Semantic Scholar It's never just skin cancer when it affects your body's largest organ. Melanoma has become known as the most deadly skin cancer with many people falsely believing that non melanoma skin cancers (NMSCs)