US figure skater Maia Shibutani revealed the “shocking” discovery of a tumor on her kidney during a recent hospital visit due to a stomach virus.

Shibutani said in an Instagram post on Sunday that she became ill while in New York in October and only learned about the “small mass” on one of her kidneys after an MRI in LA earlier this week.

“Receiving this news has been incredibly shocking and difficult to handle,” Shibutani said. “I’ve been so scared, but I have had the full support of my family, doctors, and nurses.”

The Olympian said she received surgery to have the tumor removed on Saturday and admitted she was in pain, but added that she was recovering in the hospital.

“My doctor said there is a 60/40 chance that the tumor was malignant versus benign (we will know soon),” she wrote. “…but I am young, healthy, and feel fortunate that this was detected so early.”

Maia and her skating partner, brother Alex Shibutani, are known as the “Shib Sibs.” They took home the bronze medal in the 2018 Winter Olympics in Pyeongchang.

She thanked her supporters for the well wishes.

“I am going to try and stay positive and focus on my recovery,” she said. “I appreciate all of the support and good vibes sent my way. My fingers are crossed, too.”