SINTRA, Portugal (Reuters) - The euro zone is "very advanced" on the disinflationary path but there remain "question marks" hanging over the outlook for economic growth, European Central Bank President Christine Lagarde said on Tuesday.

"We're very advanced on that disinflationary path," Lagarde told the ECB's annual Forum on Central Banking. "We are in that slow recovery that came about in the first quarter and which we hope will persevere but all of that is (fraught) with uncertainty and big question marks about the future."

(Reporting By Francesco Canepa, Editing by Timothy Heritage)