Swedish midfielder Kristoffer Olsson suffers from multiple small blood clots on both sides of the brain as a result of an extremely rare inflammatory disease of the cerebral vessels, the player's club, FC Midtjylland, reported on Thursday.
Olsson, 28, has been in the hospital and put on a ventilator after falling unconscious at home last month. He was admitted to Aarhus University Hospital, where he underwent several scans and tests in recent weeks, the club said.
“The diagnosis coincides with the thesis on which specialist doctors have worked until now and treated Kristoffer,” the Danish club said in a statement.
“Kristoffer Olsson's condition is now considered stable and doctors continue to see some progress. At the same time, they consider that Kristoffer's level of consciousness is increasing.
“In the coming period, doctors will slowly try to gradually wean the Swedish midfielder off the ventilator. But he remains in intensive care and it is not yet possible to say anything about the term of treatment and the final prognosis.”
The club said last month that Olsson's condition was not related to self-harm or external factors.
Olsson, who has earned 47 caps for Sweden, began his professional career at Arsenal and also played for Swedish side AIK and Belgian side Anderlecht.
