After being diagnosed with T-cell lymphoblastic lymphoma at another hospital, Yiyi experienced several central relapses. She received multiple rounds of high-dose methotrexate and repeated intrathecal injections but did not achieve remission.

When she was admitted to Beijing GoBroad Boren Hospital, Professor Yonghong ZHANG's team thoroughly reviewed her previous treatments and determined that her symptoms did not align with a central relapse. Further tests revealed that Yiyi had a concurrent cytomegalovirus infection, leading to a diagnosis of cytomegalovirus encephalitis. Following antiviral treatment, the abnormal cells in her central nervous system disappeared, and Yiyi's condition improved quickly. Her subsequent treatments went well, and she achieved complete remission, which has persisted. Yiyi, who enjoys singing and dancing, is now able to perform on stage again.