first here's his store are i. >> nathan adrian, building the lead. >> reporter: olympic champion nathanmpic gold medalist made a shocking announcement on social media last month. he wrote i went to the doctor as something didn't seem quite right. i unfortunately learned that i have testicular cancer. on the brigt side, we caught it early. i have already started treatment and the prognosis is good. i will be back in the water in a few short weeks with my sights fully set on tokyo. with a positive outlook as strong as his determination, nathan made his journey public. he was smiling in the hospital after undergoing laparoscopic surgery and back at the gym just a week later applying his competitive spirit to an entirely new battle. the same drive that propelled him to the podium in the last three summer olympics. >> my goal ever since high school basically has always been the same. it's always just to train hard and see how fast i can go. >> reporter: while under a doctor's close observation, nathan is now back in the pool and working toward two new goals, grabbing gold again at the 2020 o

olympic champion nathan adrian is facing his fiercest opponent yet. >> adrian with a gold for the u.sto the doctor as something didn't seem quite right. i unfortunately learned i have testicular cancer. on the bright side, we caught it early. i have alreant started treat and the prognosis is good. i'll be back in the water in few short weeks with my sights fullyet on tokyo. with a positive outlook, he made his journey public. he was shining in the after undergoing laparoscopic surgery and back in the gym just a week later, applying his competitive spirit to an entirely new model. the same drive that propelled him to the podium in the last three summer olympics. >> my goals ever since high school have been the same. 's always been to train hard and see how fast i can go. >> reporter: while uer a doctor's close observation, nathan is back in the pool and working toward two new goals. grabbing gold at the 2020 olympics andringing awareness to men's health by sharing his story. >> he is here this morning to do just that. nathan, good to see you. it's been just over a month since yous shar