Golf legend Seve Ballesteros is in a serious condition and is to undergo a third round of brain surgery.

The Madrid hospital where the Spanish golf star is being treated confirmed that the operation would go ahead to try to remove the rest of his brain tumour, the Sky News reported.

A spokesman for La Paz Hospital said: “Ballesteros remains in a serious and stable condition and will undergo a new operation.”

He said the tumour was in a particularly difficult area for surgeons to reach, adding: “It is located in an area that requires a very thorough approach of great complexity.”

Doctors said the 51-year-old is suffering from an oligoastrocytoma - a tumour that affects two types of brain cell and spreads diffusely inside the brain cavity. Dr Geoff Pilkington, a tumour expert at the UK’s University of Portsmouth, said the tumour was very difficult to eradicate but survival time could be improved by radiotherapy followed by chemotherapy.

He said it was difficult to say how long he might survive without knowing more about the tumour, which will have been classified from one to four on a grade of seriousness.

The hospital declined to reveal the tumour’s grade. “I think it’s going to be at least a three because the mixed tumours usually are,” he added.

“They generally develop into a high grade tumour from which a patient will eventually die. This is not good. The likelihood is that he will die from the tumour at some stage.”

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