Michael Jackson could be about to postpone more of London residency according to reports in today's British tabloids.

The star has already delayed the start of the London gigs by five days on productions grounds.

But today's Sun newspaper, which has maintained Michael has cancer, claims the singer could postpone more shows in order to have radiotherapy.

It is thought Michael has the option to have full treatment, which could jeopardise the whole tour, or undergo a more mild form of treatment.

“Michael has a devil of a decision. The temptation is to go for the treatment which will allow him to perform,” a source said.

“The last thing he wants is to let down his fans. But it may well turn out that radiation therapy is still needed if the cancer is deep in his cells.

“That can have really nasty side effects and leave him unable to sing at all.”

Despite the newspaper's cancer claims, promoters have maintained that the 50-year-old star is in good health.

But he has regularly been spotted leaving a medical facility in recent weeks which specialises in cancer treatment.

Michael has not performed a full concert since he was cleared of child molestation charges in 2005.

(by Jason Gregory)