The official diagnosis is Dengue fever -- also known as "breakbone fever" -- and is a mosquito-borne tropical disease.
How that ended up coursing through the veins of Ultimate Fighting Championship (UFC) lightweight Yan Cabral is something only the Brazilian can answer, but it was enough to bounce him from his upcoming showdown against K.J. Noons.
Sherdog.com brought word of the line-up change on Wednesday.
Stepping in to replace him on short notice is Alex Oliveira, who makes his sophomore appearance at the UFC Fight Night 67 mixed martial arts (MMA) event, scheduled for May 30, 2015 inside the Goiana Arena in Goiana, Brazil, airing live on UFC Fight Pass and FOX Sports 1.
Noons (13-7, 1 NC) was last seen battling Daron Cruickshank to a no contest at The Ultimate Fighter (TUF) 20 Finale, thanks to an inadvertent eye poke. Oliveira (10-2-1, 1 NC), meanwhile, dropped his UFC debut to Gilbert Burns last March in Brazil.
To see the revised UFC Fight Night 67 fight card and line up, headlined by a welterweight showdown pitting Carlos Condit opposite Thiago Alves, click here.