At age 20, while double-majoring in English and computer science at East Carolina University, he learned that his swollen lymph nodes were a symptom of stage 2 Hodgkin's lymphoma.
In 2003, Kelly Preston told Montel Williams that when Jett was 2, he became ill with flu symptoms, including fever, rashes and swollen lymph nodes, before a doctor diagnosed him with Kawasaki disease.