You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is All of the following are good prognostic factors for pediatric acute lymphoblastic leukemia, except: and explain in detail?
Favorable prognostic markers include Age between 1 and 10 years, A low white cell count at diagnosis, Hyperdiploidy, Trisomy of chromosomes 4, 7, and 10, and the presence of a t(12;21). Several factors are associated with a worse prognosis: Infancy, older age at diagnosis (presentation in adolescence or adulthood) Translocations involving the MLL gene Higher WBC count at diagnosis (peripheral blood blast counts greater than 100,000/cumm) Presence of CNS disease at diagnosis Hypodiploidy