Seve went into the hospital recently for a fainting spell and a nasty fall as a result.  The British papers had been reporting that things were much worse than a simply faint. 

This from the Times:

Seve Ballesteros, the most flamboyant golfer of his generation, confirmed yesterday that he had a brain tumour, but said that he was ready to “confront the most difficult match of his life”.

It is not yet known if the tumour is malignant, and Ballesteros, 51, will undergo a biopsy tomorrow. The Spaniard, who won five majors including three Opens, has been in hospital in Madrid since collapsing a week ago.

Obviously some terrible news.  I'm pretty sure that everyone has been impacted in some way by cancer, but this is particularly troubling for the golf world.