Celebrity Trainer Gunnar Peterson Reveals 4-Year-Old Daughter's Leukemia

Celebrity trainer and former Los Angeles Lakers Director of Strength and Endurance Gunnar Peterson shared the heartbreaking news on his Instagram Wednesday.

Peterson, a Duke University alum who has trained Sylvester Stallone, the Kardashian family, and retired NFL quarterback Tom Brady, posted photos from a hospital where his daughter is undergoing treatment for acute myeloid leukemia.

Celebrity trainer Gunnar Peterson shares daughter, four, has leukemia: 'Life changing turn' https://t.co/AuZsMdJ4Rj

— Fox News (@FoxNews) March 28, 2024

"Our perfect 4-year-old daughter, Monroe Vivian Peterson (MVP, see that?!), had a nagging cough, on-and-off fever, and an odd pallor for a few days last week," Peterson explained. "Then my wife noticed bruising on her legs, which was odd since she hadn’t been very active because of the other symptoms, and she took her to the hospital."

After four days in the hospital, Monroe's blood cell count and platelets had dropped significantly. "Hemoglobin number lower than a soccer game final," Peterson wrote. "Hematocrit front row on the struggle bus. Needs immediate transfusion(s)."

As outlined by the Mayo Clinic, "acute" in acute myelogenous leukemia signifies the disease's swift advancement.

This rapid progression was evident in the Petersons' situation. Peterson indicated that prompt treatment was imperative for Monroe, along with diagnostic tests to ascertain the underlying cause.

Monroe is expected to undergo procedures including a spinal tap, chemotherapy, and a bone marrow biopsy.

With her diagnosis, she qualifies as a Make-A-Wish candidate. "She has AML leukemia. How the f*#! did we get here?!?!" Peterson exclaimed.

According to the American Cancer Society, AML leukemia "starts in the bone marrow but most often quickly moves into the blood." It can spread to other parts of the body.

"Our Warrior Princess will crush this! She has even said it herself!" Peterson declared. "Please hold our daughter, and our family—immediate and extended—in your hearts, thoughts, and prayers."

Peterson received numerous well-wishes, including messages from Khloé and Kim Kardashian, and Dwayne 'The Rock' Johnson.