A mother was diagnosed with stage 4 cancer. Instead of opting for chemotherapy, she chose to self-treat with cannabis oil. Doctors were surprised at how her condition improved drastically after her diagnosis suggested that she only had a few weeks to live. Susan Dhillon is a 51-year-old mother of three who was diagnosed last June 2018 with stage 4 cancer of the mouth, nose and lower skull. Her condition was referred to as stage 4 advanced sinonasal carcinoma. xxx.