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Cincinnati Bengals defensive tackle Devon Still must have felt like he won the Super Bowl on Wednesday, when he announced on Instagram that his 4-year-old daughter, Leah, is in remission.
The NFL player posted a photo of Leah smiling while offering a playful punch toward the camera lens, along with a lengthy and emotional caption.
"It was not easy," reads part of that caption, "but every day and [with] every treatment Leah fought like hell and kicked cancers butt!"
Leah had been diagnosed with Stage 4 neuroblastoma on June 2, which her father described as "the most devastating day of my life." But 296 days later, his family celebrated her oncologist's prognosis that her cancer is, according to Still, "officially in REMISSION!"
He added, "Funny thing is there is really no way of describing it because I never knew this feeling existed. When I look at my daughter all I can do is smile and hug her."
Still offered a long list of thank yous directed toward family, friends and fans who sent gifts and offered prayers, doctors and other medical professionals, the Bengals, donors to cancer charities and other supporters to raise awareness for the cause.
Leah's cancer battle has been well documented, with many notable benchmarks that include a spike in sales of Still's Bengals jersey, a massive show of support from the team and its cheerleaders, an "I am Leah Strong" children's book that Still and his daughter wrote and Leah's inspirational runway walk at New York Fashion Week.
Despite the good news, Still remained somewhat cautious Wednesday about the days ahead.
"Leah is not done with treatments yet," he wrote. "She still needs more to make sure the cancer cells do not return and to build back up her immune system and other damage from the chemo but I know my little warrior will get through it!"
Earlier in the post, Still wrote that he was "proud and blessed to call Leah" his daughter.
"She has made an impact on me and on the world, at the age of four, that I can only wish to make in a lifetime," he added.
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This article was originally published Mar. 25, 2015 at 5:40 p.m. ET.