The family of 10-year old boy battling rare form of cancer has been given the "gut-wrenching" news that a tumour on his spine has returned.
Harrison Mundy was first diagnosed with Ewing's sarcoma in June.
His father, Alan Mundy, said the family was told the tumour on his son's spine had returned and the 10-year-old had built up resistance to chemotherapy.
The family were continuing with radiotherapy and a second type of chemotherapy at Auckland's Starship Children's Hospital in the hope it would shrink the tumour and minimise the risk to the spinal cord.
"I heard a quote the other day - 'once you get to Hell, keep walking', and that's what we are doing," Mr Mundy said.