Hi!XXXXXXX,\r\rUsually a sebaceous cyst wont lead to cancer and also it doesn't heal on its own. A sebaceous cyst needs to be squeezed out and the cyst wall also has to be removed along with.\r\rIf at all it has come positive for cancer, then there is a rule which onco-surgeon follow while removing a malignant tissue. They remove it leaving a normal zone around it. This would not let it spread further. The best judge would be a onco -surgeon who would perform the surgery on you.\r\r‘Hope I have answered your query, I will be available to answer your follow up queries’. \r\r