Celtic first-team coach Tommy Burns is facing a fresh battle against cancer, the club has confirmed.
Burns will continue in his role as Celtic first-team coach
The 51-year-old was diagnosed as suffering from a melanoma in March 2006 and had responded well to treatment.
But a spokesperson for Celtic said: "Celtic today confirm that first-team coach Tommy Burns is to receive continued cancer treatment.
"Tommy intends to continue as first-team coach and head of the youth academy during this treatment."
The spokesperson added: "Clearly, Celtic requests that the privacy of Tommy and his family is respected at this time."
Burns began playing for Celtic in 1974 and also won eight Scotland caps in a distinguished career which ended as player/manager of Kilmarnock.
He went on to manage Celtic, the club he supported as a boy, and steered the club to a Scottish Cup win over Airdrie in 1995.
Speaking after being first diagnosed with skin cancer two years ago, Burns told BBC Sport: "This happens to a lot of people, so it's just a question of taking each day as it comes.
"Through this, I've not been alone. I have my faith, which is fantastic, and I've had lots of messages of goodwill."