A genetic fault of the gene TGFBR1 causes multiple self-healing squamous epithelioma (MSSE) or Ferguson-Smith disease. Researches at the Univerity of Dundee report that the gene is responsible for the production of a protein which is involved in the growth and development of cells and usually prevents the growth of tumours in some cases but if a cancer is advanced and agressive then the gene helps the spread of the cancer.
However, in the case of MSSE, the fault of the gene means the person suffers from several small tumours but the TGFBR1 gene lacking tumours heal themselves.
Summary from: http://www.britainnews.net/story/749639 photo from: http://topnews.net.nz/reports/212304-scientists-uncover-secret-self-healing-skin-cancer
New drugs could be developed and an understanding of the gene could give a better understanding of the problems of other cancers and tumours.