He was, however, given the all clear in April 2020 after undergoing months of chemotherapy.
Since then, he has returned to work as a member of Roberto Mancini’s staff with Italian national team.
But now the 57-year-old who won the FA Cup and League Cup with Chelsea, said the deadly illness has returned.
Speaking at a London book launch, he said, “I feel good, but my journey is not yet complete.
“The unwanted guest, as I call it, is still here with me. At this moment I am in maintenance mode.
“The tumour is still there. At times it is more noticeable, at others less so.
“I will keep fighting because I want to be here for many more years.
“I want you to have to put up with me for a long time to come.
“I take that strength from my family, friends, and all those who give me such courage. I can’t thank them enough.”