A panel of experts have found a 90% blood stem cell match for the 7-year-old, giving him a hope of beating familial hemophagocytic lymphohistiocytosis.

A 43-year-old Brazilian native, who joined the worldwide donor register, has been identified as a 9 out of 10 match, along with four others in the same country.

The panel ideally wanted the donor to be 100% compatible, but felt that it was better to go with a 90% match whilst Finn is doing well, rather than risk waiting for a complete match which may never come. Posting on social media, Finn's Mom, Jo, said:

"On 11th November, Finn will be admitted for chemotherapy before going for his transplant on the 18th. A few weeks before he will have a line put in and part of his testicle removed. We’re so pleased to finally have a match and a plan - but both petrified about the whole process.

"However we have to believe that this is going to be the beginning of getting Finn better and securing him a bright & happy future. Thank you to everyone who has supported us this far in every way possible."

Familial hemophagocytic lymphohistiocytosis is a disorder, ocurring in around 1 in 50,000 people worldwide, in which the immune system produces too many activated immune cells. This over-activation damages the liver and spleen, resulting in enlargement of these organs.

Finn and his parents have been campaigning for as many people as possible to join the stem cell register by signing up to a testing kit through DKMS UK - a project which has seen them add 18,000 new names added to the list to become possible donors, for others around the world in need of a stem cell transplant.

You can find out more about joining the register at dkms.org.uk.