Doctors began tests on stricken F1 legend Michael Schumacher's brain today in a bid to precisely locate the area where he suffered massive damage in his pre-Christmas ski accident.
Schumacher has been in a artificially-induced coma for 15 days and remains stable, but critically ill.
The medical team treating him in Grenoble, France, that there are still great fears of "unexpected complications," such as a brain hemorrhage and infection, according to reports.
A small part of his skull has been removed in a bid to relieve pressure on his brain, according to a Zurich paper at the weekend,.
Swiss neurosurgeon Frédéric Rossi told the Zurich Tagesanzeiger that the list of dangers from such an op "is long, ranging from swelling to bleeding to the accidental opening of the brain's outer membrane."
Schumacher, 44, was out skiing with friends and his 14-year-old son Mick on December 29 when he fell on to rocks at the French resort of Meribel. He had to be helicoptered to hospital and has been fighting for his life ever since.
His wife Corinna and his two children remain at his bedside in a constant vigil and high-profile figures from the world of F1, industry and showbiz continue to make brief visits to see him.