The PI resigned the institute, and the rest investigators at the institute decided to terminate the study.

The investigators would like to propose a prospective longitudinal observational cohort study for patients who will be diagnosed and/or treated for acute lymphoblastic leukemia at Asan Medical Center, Seoul, Korea, to use the acquired data for fundamentals of other retrospective analysis.

1. Acquisition of informed concent form

2. Data acquisition from medical record including

   • demographic / disease-associated factors
   • details of treatment, and its results
   • complications during treatment
   • genetic data
   • survival outcome (upto 10 years)

3. Accumulation of data for 30 years

4. Use of data for other retrospective analysis (including Asan Medical center Cell Banking basic data)

Inclusion Criteria:

• All patients who are diagnosed and/or treated as acute lymphoblastic leukemia at Asan Medical Center (including biphenotypic acute leukemia with Philadelphila-positive, Burkitt leukemia/lymphoma)
• 15 years of age and over
• All patients who give written consent according to guidelines at Asan Medical Center committee on human research

Exclusion Criteria:

• Patients who refuse to give consent to registering

Patients who are diagnosed and/or treated with acute lymphoblastic leukemia at Asan Medical Center, Seoul, Korea