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.
More top news
Police have released CCTV images of the Manchester suicide bomber on the night of the arena attack.
The grieving father of a teenage victim of the Manchester bombing told a mother hugging her son: “Look after him - because you never know.”
The ITV soap currently runs five episodes a week across three days - two on Mondays and Fridays, and one on Wednesdays.