- Video report by ITV Wales National Correspondent Rob Osborne
A family of a six-month-old baby diagnosed with leukaemia are appealing for people to join the bone marrow register.
Bethan Morgan, from Aberdare, took her son Harri Stickler to the GP with some swelling under his eye. Within days he had been given the life-changing diagnosis.
Harri's great-aunt Clare said the family are still coming to terms with the heartbreaking news, which came just weeks before Christmas.
Harri has now begun a three-month cycle of chemotherapy to tackle the cancer.
If the treatment is successful, he will then need a bone marrow transplant.
Harri and his parents are staying in the Noah's Ark Children's Hospital in Cardiff, while Harri's six-year-old brother Logan stays with other relatives.
The family are being supported by the Welsh children's cancer charity Latch.
For more information on becoming a bone marrow donor:
- Aged 16-30? You can find information on the Anthony Nolan Trust website
- If you are older, you can find more information on the DKMS website