The 25-year-old Samoan flanker collapsed in the Durham Cup Final in April, whilst on loan to Darlington Mowden Park. He was rushed to hospital where a scan revealed the tumour, and he underwent surgery to have it removed.
Otuvaka is now no longer able to play rugby and will receive a donation from the PRA this Saturday at Kingston Park during the half-time interval of his club's Zurich Premiership encounter with league-leaders Bath.
The PRA – launched in 1998 – is a welfare body being established to cater for the specific needs of rugby's professional era.
The PRA's Benevolent Fund – supported by business partners, sponsors and proceeds raised from PRA events – supports players forced to retire from rugby through serious injury or illness.
Other benefactors of this fund include Sale's Andy Blyth who was forced to retire after sustaining a broken neck, Jarrod Cunningham of London Irish, who suffers from Motor Neurone's Disease, and the Nick Duncombe Memorial Fund, which was set up in memory of the England and NEC Harlequins player, who died early this year at the age of 21.
Newcastle Falcons PRA representative Hugh Vyvyan said: "As a squad we were extremely saddened by Soa's situation and miss him being part of the team.
"He was a very popular member of the squad and is a great family man. It is very encouraging to hear that Soa's condition is not life threatening. We hope this donation from the PRA Benevolent Fund will go some way to aiding his recovery."