The purpose of this study is to provide treatment with lyophilized S95014 in pediatric patients with ALL who completed the CL2-95014-002 study during the induction phase and who are clinically benefitting from S95014 without major toxicity.

Inclusion Criteria:

• Patient who completed the CL2-95014-002 study
• Patient currently receiving clinical benefit from previous treatment with S95014 as per investigator's judgment
• Signed informed consent and assent, when appropriate
• Highly effective contraception method

Non-inclusion Criteria:

• Unlikely to cooperate in the study
• Pregnant and lactating women
• Participant already enrolled in the study (informed consent signed)
• Prior surgery or bone marrow transplant related to the studied disease
• History of sensitivity to polyethylene glycol (PEG) or PEG-based drugs
• Psychiatric illness/social situation that would limit compliance with study requirements
• Group "E" and "T-HR" patients according to ALL-MB 2015 protocol classification
• Major safety issue due to previous S95014 administration (e.g. non recovery of safety parameters, serious hypersensitivity, serious pancreatitis, serious haemorrhage, serious thromboembolic event)
• Significant laboratory abnormality or uncontrolled intercurrent illness (e.g. life-threatening acute tumor lysis syndrome, symptomatic congestive heart failure, cardiac arrhythmia, severe or uncontrolled active acute infection) likely to jeopardize the patients' safety or to interfere with the conduct of the study, in the investigator's opinion

Qualified scientific and medical researchers can request access to anonymized patient-level and study-level clinical trial data.

Access can be requested for all interventional clinical studies:

• used for Marketing Authorization (MA) of medicines and new indications approved after 1 January 2014 in the European Economic Area (EEA) or the United States (US).
• where Servier is the Marketing Authorization Holder (MAH).The date of the first MA of the new medicine (or the new indication) in one of the EEA Member States will be considered for this scope.

In addition, access can be requested for all interventional clinical studies in patients:

• sponsored by Servier
• with a first patient enrolled as of 1 January 2004 onwards
• for New Chemical Entity or New Biological Entity (new pharmaceutical form excluded) for which development has been terminated before any Marketing authorization (MA) approval.

After Marketing Authorisation in EEA or US if the study is used for the approval.

Researchers should register on Servier Data Portal and fill in the research proposal form. This form in four parts should be fully documented. The Research Proposal Form will not be reviewed until all mandatory fields are completed.