Ross and Angela Middleton, from Bridge of Don, were devastated when doctors found a tumour the size of a grapefruit in the chest of their eight-year-old son Findlay on Christmas eve last year.
The doctors confirmed on New Year's Day that Findlay had Burkitt's non-Hodgkin's Lymphoma, a rare form of cancer.
The treatment had to take place at the Royal Hospital for Children, Glasgow, miles from the family home, separating the parents and Findlay from his 13 and 18-year-old brother and sister.
Ross said: "When we were told about the cancer we were in shock, denial, disbelief. It was serious and we thought Findlay might die. We had no idea what to say – to each other, to his brother and sister, our parents, and Findlay himself.
"We were in survival mode. You just react to the things in front of you. There is no structure. We still can’t look back on this and fully understand what has happened to Findlay, to our family, as it has so many other families.
"CLIC Sargent helped us get the support we needed. They helped us get accommodation and financial help. We hadn’t considered things like DLA, but they told us they could get it and then helped with the forms. They also got us a grant to help with our costs."
CLIC Sargent Fundraising Manager Holly Taylor said: "It is hard to imagine learning that your child has cancer, but every day in the UK, that is what happens to 10 families.
"It is wonderful to know that CLIC Sargent has been able to support the Middletons, and help them cope with cancer, and their fundraising will help us support many more young patients and their families."
Show your support
Ross, who works for BT Openreach, is hosting an online fundraising competition to raise funds for CLIC Sargent.
Anyone who makes a donation on the family's Findlay's Fighting Fund Mydonate page will be entered into a draw to win one of the three prizes donated by BT, the chance to experience a drinks reception and a three course meal for two at the BT Tower, London this June. The draw will close at 12 noon on Wednesday 25 May.