De Jong suffers collapsed lung
Newcastle striker Siem de Jong has suffered a collapsed lung and will be out for another two months.
The Holland international underwent surgery on Tuesday, with De Jong suffering from a similar complaint to one he had while with Ajax in 2013.
"We are all hopeful that the surgery I have had will ensure I don't have any repeat of the condition in the future," De Jong told the official Newcastle website.
"After four months of hard work getting back to full fitness it is such bad luck to suffer another setback.
"It's very sad for me personally, especially since I was almost back in contention and feeling great.
"I am determined to come back stronger as soon as possible."
De Jong, who has won six caps for his country, has had a nightmare spell at Newcastle since completing a £6million move from Ajax last summer.
The 26-year-old made three appearances for Newcastle before he suffered a serious thigh injury in August and had only recently returned to training with the first-team squad.