The strongest Opposition party said in a statement that Racan was not expected to stay in hospital for a long time, urging the media to respect Racan's privacy.
The SDP leader announced in January that he had health problems and that test conducted in a Munich hospital showed that he had cancer on his left kidney. After the surgery, Racan returned to Zagreb in March for recuperation at home. His deputy Zeljka Antunovic is currently at the helm of the party.