<s>[INST] A person who was infected from cancer disease in 2007 The effected part was below part of knee,a doctor remove his leg to prevent from spreading of viruses.he was suffering from the problem of Malignant tumor.Is there any possibility to spread viruses in other parts of his body in future? [/INST] Welcome to Chat Doctor. Your query has been assigned to me, and I am happy to assist you today for the health issues you raised. No there is no possibility of spread of that primary cancer from knee to other areas of the body. The patient must have undergone above knee amputation of the leg and his lesion was removed along with that. Now there are no chances for spread of that primary disease. But cancer is due to the gene mutations and due to that cells start growing at uncontrolled pace. If the same gene mutations happen once again, there may be appearance of tumor in body elsewhere especially if the previous one was from the origin of bone marrow. A consultation from an Oncologist is needed for proper care. Hope it was all you needed the answer for. If you have some more questions or doubts in mind, please let us know to help you. We are all a team of the best experts from all over the world to assist patients online. Give your feedback to help us make this service even better. Healthiest Regards! </s>