A New Zealand mum who made headlines across Britain after running away with her son to spare him radiotherapy has confirmed the boy's cancer has returned.
Sally Roberts, 37, went missing with her seven-year-old son Neon for four days because she felt she ''didn't have a choice'' and radiotherapy was being forced upon her.
Neon, who has a twin sister, has already undergone surgery to have a cancerous tumour removed from his brain.
MRI scans on Saturday (New Zealand time) revealed a new cancerous "mass'' about 1cm in diameter had grown back.
Roberts, 37, and her estranged husband Ben, 34, were given the heartbreaking news during an urgent meeting with doctors, the Telegraph has reported.
During the meeting a neurosurgeon confirmed the mass was malignant and further surgery followed by chemotherapy and radiotherapy was required to save his life.
Neon's father has reportedly agreed to the radiotherapy, however Roberts said she was still hoping to avoid treating him with radiotherapy or chemotherapy ''because of the side effects''.
"It's all up in the air," Roberts said in an interview with the Daily Mail.
"I don't want my boy to have radiotherapy because of the side effects. I still think Neon does not need it.
"It is dreadful, it is really awful."
Roberts sparked a nationwide police hunt earlier this month when she went into hiding with her son. She has since gone on British talk shows and argued that radiotherapy treatment would lower his IQ and possibly leave him infertile.
Roberts, a former DJ from Auckland, took her battle to the High Court over fears that radiotherapy on Neon's medulloblastoma tumour would "fry his brains".
Doctors argue that Neon could die within months without the treatment.
A High Court judgment was yesterday delayed after the judge said there had been "medical developments''.