Charlie suffers from mitochondrial DNA depletion syndrome (Family handout/PA)
This means he can examine Charlie, and has full access to his medical records and the hospital’s facilities.
A judge ruled that Charlie’s mother, Connie Yates, could be present for Monday’s discussions about Charlie’s treatment with the foreign doctor and other medical experts.
Meetings are scheduled to take place on Monday and Tuesday to talk about Charlie’s condition, before litigation resumes.
Charlie’s parents are fighting for their son to be allowed to go to the US for a therapy trial for his rare genetic condition, overseen by Dr Hirano.
Chris Gard and Connie Yates have clashed with doctors (Family handout/PA)
Great Ormond Street Hospital specialists say the treatment will not work, and the little boy’s life support should be turned off.
His parents, from Bedfont, west London, have already lost battles in the High Court, Court of Appeal and Supreme Court. They also failed to persuade European Court of Human Rights judges to intervene.
Mr Justice Francis has considered the couple’s latest claims at preliminary hearings in the Family Division of the High Court in London over the last few days.
He is due to stage further hearings later this month following this week’s specialist gathering.
Charlie is being treated in Great Ormond Street Hospital in London (Dominic Lipinski/PA)
Great Ormond Street Hospital said its medical director met the visiting doctor on arrival. The hospital said clinical staff were “on hand to facilitate the visit”.
As well as Charlie’s medical records, Dr Hirano will also have access to “all clinical systems”, which includes diagnostic images.
The hospital also said the visiting neurosurgeon would have the opportunity to examine the 11-month-old.