Israel Adesanya has addressed the pectoral controversy after Jon Jones brought it up on social media during UFC 253.
Adesanya stopped Paulo Costa in the second round of their championship bout at UFC 253 last weekend.
He put on a clinic to defend his UFC middleweight title, but it wasn't just his performance that caught everyone's attention.
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Fellow UFC fighters and fans pointed out Adesanya's right pectoral with arch rival Jones saying: "What's up with Izzy right tit."
The Nigerian-born Kiwi has now spoken about his condition, saying he doesn't know what it is and will get tests back to see what it is.
He also rubbished claims that he has taken steroids in his career.
Doctor Brian Sutterer explained that it is most likely a natural deformity caused by a condition called pseudogynecomastia.
"I don't think this is a peck tear, I saw that pop up online and there's no way Adesanya would have been able to fight with a peck tear," he said.
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"The other thing we need to think about here is whether this is just an accumulation of fatty tissue.
"That would be be called pseudogynecomastia.
"That can be from a number of totally different things, even things like repetitive trauma to an area which would make complete sense for a mixed martial artist."
Adesanya improved his MMA record to 20-0 (9-0 in the UFC) after thrashing the previously-undefeated Costa on 'Fight Island'.
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And the 31-year-old is thinking about his next opponent as he eyes No.3 ranked UFC middleweight Jared Cannonier, who faces Robert Whittaker next month at UFC 254.
A win over the former UFC middleweight champion could book his title shot against Adesanya.
Speaking about 'The Killa Gorilla', the UFC middleweight king said: "Jared Cannonier, I love his energy, he's a beautiful man. I said, 'You destroy Robert Whittaker, you're next.'"
Featured Image Credit: UFC/ESPN MMATopics: Jon Jones, UFC News, UFC 253, Fight News, UFC, Israel Adesanya
