Black hands are cancer?

Cancer is a common malignant tumor in clinical practice. Early detection and early treatment can achieve the best therapeutic effect. People with high risk factors for cancer should be screened for early diagnosis. The causes of cancer are related to environmental factors, bad eating habits, viral and bacterial infections, and the genetic factors of the patient himself. There is a family history of cancer, also need to carry out timely screening, once advanced cancer, clinically difficult to achieve cure.