At the time the youngster's problems were described as being a "chronic condition" but details weren't made public and it seemed like the popular youngster were suffering a mystery and un-diagnosed medical problem.
It now seems that the medical problem has been diagnosed with Matsumoto recently under-going surgery to treat Hypothyroidism.
The fighter was originally announced for October 3rd rematch with Lopez but with the youngster only having surgery recently there is little wonder that Matsumoto hasn't been featured on the poster for the show and is now looking very unlikely to compete in a months time. Instead he's likely to be given some time to heal from what is a serious procedure that has left him with a huge scar on his neck.
The popular is looking forward to his return but it's clear that there are more serious issues afoot and that recovery from the surgery is of utmost importance. Given that he has an excellent, strong and reliable team behind him he won't be rushed back to the ring. Hopefully the surgery will deal with the health problems that could, potentially, have totally derailed what is still a very promising career.
We wish Ryo a speedy recovery!
(Image courtesy of Ryo Matsumoto's twitter account)