Mother Sally Roberts is launching an appeal to to stop her son from having radiotherapy which is due to start on 9th January.
Last year the High Court ruled her seven-year-old son Neon Roberts should have the treatment, following surgery on a brain tumour, despite his mother's wishes.
Sally Roberts said in an interview that her legal team has made an application to appeal against the decision to treat her son Neon's brain tumour with radiotherapy, adding that she intends to sue if he suffers side-effects.
She told the Daily Mail: "I've been told I’m an irresponsible parent. I feel backed into a corner. It is taking away my human rights as a mother. Neon is my son. How dare the state impose their treatments on my son? They are not allowing me as the mother to make these decisions.
"If I’d been given the extra time I asked for to research these other therapies in more detail, things could have turned out differently."
Speaking on behalf of Neon's father, solicitor Gwen Williams said:
"He is very grateful for the careful way in which Mr Justice Bodey has conducted his analysis of the facts and the sympathy he has shown to all the family.
"He is also grateful to the medical teams for the great care that they have shown towards Neon and continue to show towards Neon and for the great time and energy they have devoted to this case in general."
Speaking on behalf of Neon's father solicitor, Gwen Williams said:
"Neon's health and recovery have always been Mr Roberts' priority. Whilst he has always respected Neon's mother's views his own opinion, following deep discussions with the medical team, has always been that Neon should have the treatment that the medical team wanted."
Ms Roberts declined to comment.
Neon's father Mr Roberts' solicitor, Gwen Williams, said:
The judge said that a specialist treating Neon had given "most impressive" evidence and was at the "cutting edge".
He praised the doctor for his "most impressive dedication" to Neon's case.
The judge said Neon is being treated by a team of experts.
A specialist treating Neon had told the court that a team of experts involved in Neon's care had agreed that radiotherapy treatment was his best interests.He said doctors wanted to start radiotherapy treatment as soon as possible.
And he suggested that Neon could lead a "good life" after receiving radiotherapy treatment.
Lawyers representing doctors involved in Neon's care told the judge that Ms Roberts was proposing "experimental therapies", which were "unproven", as alternatives to radiotherapy.
Mr Justice Bodey had said he had to balance risk against benefit in deciding whether to allow doctors to use radiotherapy treatment.
"It is a balance between the disadvantages of radiotherapy and the improved prospects of living," he had told lawyers."You can only suffer these detriments to your life if you are alive."
Seven-year-old Neon will have radiotherapy treatment, following surgery on a brain tumour, against his mother's wishes.
Specialists treating Neon accepted that there were side-effects to radiotherapy but said that without the treatment the youngster could die within a few months.
Mr Justice Bodey, who heard evidence at a hearing in the Family Division of the High Court in London, said radiotherapy treatment could start.
Mr Justice Bodey said, "the mother has been through a very stressful time...but I am worried her judgement has gone away."