Sir Bobby Robson is recovering in hospital after undergoing an operation to remove a small tumour on his brain.
Robson has overcome three cancer scares in recent years
A statement said the operation went "very well" and that the tumour had been completely removed.
The 73-year-old, who is currently a consultant for the Republic of Ireland side, will be attended to by his consultants over the next two days.
Robson was taken to hospital after falling ill during a match on 5 August at Ipswich.
The 73-year-old had a lung tumour removed earlier this year and has had cancer surgery on two other occasions.
Robson led England as coach to the 1990 World Cup semi-finals and had a successful managerial career at Ipswich.
He also managed Barcelona, PSV Eindhoven, Sporting Lisbon, FC Porto and Newcastle.
Robson, who was brought in by Republic of Ireland at the same time as coach Steve Staunton, will miss the team's opening Euro 2008 qualifier against Germany in Stuttgart on 2 September.
The Football Association of Ireland is hopeful he will be able to resume his duties alongside Staunton for the games against Cyprus and the Czech Republic in early October.