Rob's GP referred him to a specialist for ultrasound scans which revealed a malignant tumour.

BBC: NEWS | Health | 'I could have died of stubbornness'

Earlier on Saturday in Spain Real Betis defender Miki Roque, a former Liverpool youth player, announced he needs surgery on a malignant tumour in his pelvis.

BBC: Barcelona beat Zaragoza as AC Milan edge past Juventus

The courts have previously been told that Mr Mngeni has a malignant brain tumour.

BBC: Dewani honeymoon murder: South Africa trial postponed

He beat bowel cancer in 1992, a malignant melanoma in 1995 and a tumour in his right lung and a brain tumour, both in 2006.

BBC: Legend Sir Bobby Robson, 76, dies

Once they have found a tumour, they stick to their target like glue, even piggybacking on malignant cells as these move through the body.

ECONOMIST: Cancer treatment

For example, breast cancer patients are tested to see if their tumour is positive for 'Her2', a protein that can accelerate the growth of malignant cells.

BBC: DNA mapping for cancer patients