A Scottish woman has made a full recovery from a deadly tumor and says it’s all thanks to cannabis extracts.

In 2013, doctors diagnosed Lynn Cameron with stage four brain cancer and gave her 6 to 18 months to live. Despite the hopeless outlook, Cameron took combined surgical, chemotherapy, and radiation treatments, but these had no impact on the growth.

Desperate, Cameron said she tried cannabis oil. “A good friend suggested cannabis, but I was too scared because it’s illegal,” she told the Daily Record. “I also found it hard to believe that it would cure brain cancer so advanced.”

Cameron administered a sublingual extract so it would go “straight into the bloodstream.”

Each MRI scan she received after beginning her cannabis treatment showed improvement. After the sixth scan, the tumor was completely gone, Cameron says.

According to the patient, marijuana extract, in combination with a healthy alkaline diet, is what she has to thank for her recovery. She’s ruled out that her other treatments could have contributed, saying, “I had been told that chemotherapy and radiotherapy doesn’t make much difference, so I knew it must be the cannabis doing it.”

That doesn’t exactly sound scientific. Very few doctors would recommend using cannabis oil in place of traditional cancer therapies. Some, though, would say it can work in combination with surgery, radiation therapy, or chemotherapy. In fact many say it aids in mitigating the harsh side effects of prolonged cancer therapies.

Cameron herself had a hard time finding physicians to cooperate with her cannabis treatment. “The British Medical Journal hasn’t properly investigated cannabis. The irony was they were giving me morphine and codeine in the wards. Prior to becoming ill, I had never taken a pill before in my life,” she said. “It was up to me what treatment I took, and I’m glad I researched it.”

The Scott has gone on to join the advocacy group Medical Cannabis Reform Scotland, which pushes “for the reform of the current prohibitive laws around the use of cannabis for medication”.