Olympic gold medal swimmer thanks fan who spotted suspicious mole

Australia's Mack Horton celebrates winning the gold in the final of the men's 400-meter freestyle during the swimming competitions at the 2016 Summer Olympics, Saturday, Aug. 6, 2016, in Rio de Janeiro, Brazil. (AP Photo/Matt Slocum) less Australia's Mack Horton celebrates winning the gold in the final of the men's 400-meter freestyle during the swimming competitions at the 2016 Summer Olympics, Saturday, Aug. 6, 2016, in Rio de Janeiro, Brazil. ... more Photo: Matt Slocum, Associated Press Photo: Matt Slocum, Associated Press Image 1 of / 13 Caption Close Olympic gold medal swimmer thanks fan who spotted suspicious mole 1 / 13 Back to Gallery

One fan saw something and said something, leading to a very grateful response from an Olympic swimmer.

Australian gold medalist Mack Horton posted on social media thanking an anonymous fan for contacting his team doctor about a suspicious mole on his chest.

"Shout out to the person that emailed the swim team doctor and told me to get my mole checked out," he wrote. "Good call. Very good call."