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Inclusion criteria :

* Patient or parent/legal guardian is willing and able to provide signed informed consent, and if required, the patient is willing to provide assent.
* Children or adolescent aged 2 to 18 years old (inclusive) at time of signing of informed consent.
* At screening, the patient is expected to have a minimum life expectancy of 45 days and has a performance status (PS) no greater than 3 on the Eastern Cooperative Oncology Group (ECOG) scale, or a PS no less than 30 on the Lansky score as per the Investigator's preference (see Appendix D for ECOG and Lansky scale).
* Newly diagnosed NHL or AL who is at the initiation of or during the first cycle of chemotherapy,baseline blood uric acid greater than 8 mg/dL (473 mol/L) at screening.
* If newly diagnosed NHL patient with blood uric acid no greater than 8 mg/dL at screening, the patient must be diagnosed with Stage III or IV non-Hodgkin's lymphoma with high tumor burden which will be high risk of TLS defined, with one or more of following below: A. Burkitt lymphoma/leukemia or -lymphoblastic lymphoma, and/or B. Has at least one of lymph node or tumor, the diameter \>5 cm, and/or C. Lactate dehydrogenase (LDH) no less than 2 times the upper limit of normal (ULN).
* If newly diagnosed AL patient is with blood uric acid no greater than 8 mg/dL at the screening but with a high risk of TLS defined with one of the following below criteria: A. White blood cell (WBC) no less than 100.0 10-9/L, or B. WBC \< 100.0 10-9/L with LDH no less than 2 ULN.
* The patient will receive the chemotherapy, and will be confined in hospital for at least 14 days after first dose of rasburicase.

Exclusion criteria:

* Acute promyelocytic leukemia
* Patient who has been treated or planned to receive allopurinol within 72 hours of rasburicase administration.
* Patients with abnormal liver or renal function: alanine aminotransferase (ALT) \>5 ULN, total bilirubin \>3 ULN, serum creatinine \>3 ULN.
* Documented history of hereditary allergy or asthma.
* Patients with known deficiency of glucose-6-phosphate dehydrogenase (G6PD), or a history of hemolytic disease or methemoglobinemia.
* Patients with severe infection or active bleeding.
* Previous therapy with urate oxidase.
* Hypersensitive reaction against rasburicase or any of the other ingredients of the study drug.
* Patient is not suitable for participation, whatever the reason, as judged by the Investigator, including medical or clinical conditions, or patients potentially at risk of noncompliance to study procedures.
* Pregnant or breastfeeding woman.
* Woman of childbearing potential (WOCBP) not protected by highly-effective method(s) of birth control and/or who are unwilling or unable to be tested for pregnancy (see contraceptive guidance in Appendix A).
* Male participant with a female partner of childbearing potential not protected by highly-effective method(s) of birth control

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.

• China, China