Study of Metabolic Syndrome in Young Patients Who Are Acute Lymphoblastic Leukemia Survivors and Their Healthy Siblings

Inclusion Criteria: DISEASE CHARACTERISTICS: * Meets one of the following eligibility criteria: * Childhood acute lymphoblastic leukemia survivor * Less than 22 years old at diagnosis * Treated from 1990-2007 at one of the following locations: * Fred Hutchinson Cancer Research Center and/or Children's Hospital and Regional Medical Center in Seattle, WA * Vanderbilt Children's Hospital in Nashville, TN * Meets 1 of the following treatment criteria: * Completed conventional therapy ≥ 11 months ago and in first complete remission * Received an allogeneic hematopoietic cell transplantation ≥ 11 months ago and in complete remission * No evidence of recurrent disease * Healthy volunteer * Full sibling of enrolled cancer survivor * Age 8-21 (if more than 1 eligible sibling, sibling of closest age is preferred) * No history of cancer PATIENT CHARACTERISTICS: * Able to speak, read, and write English PRIOR CONCURRENT THERAPY: * See Disease Characteristics * No active treatment for graft-vs-host disease Exclusion Criteria: * Lack of ability to speak, read, and write English * Active treatment for graft versus host disease