10,000 childhood cancer survivors to be tracked for life

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Survivor Inclusion Criteria: * Patient will have a diagnosis of childhood malignancy (or neoplasm requiring similar therapy) that was treated or followed at St. Jude Children's Research Hospital. * Patient will be at least five years from diagnosis. * Patient is willing to participate at any level of study * Patient is willing to comply with the guidelines of St. Jude domiciliary care facilities * Patient or legally authorized representative must sign informed consent for study participation. Control Participant Inclusion Criteria: * ≥5 years of age * Non-first degree relatives or friends of St. Jude patients or former patients or SJCRH employees/affiliates who are not SJLIFE study team members, or family members of SJLIFE study team, or supervised by a SJLIFE study team members, or any volunteer not associated with St. Jude. * Participant does not have a diagnosis of childhood malignancy or childhood neoplasm requiring similar therapy (i.e., diagnosed \<21 years of age). * Participant is not currently pregnant or lactating. * Patient is willing to comply with the guidelines of St. Jude domiciliary care facilities. * Patient must sign informed consent for study participation. Gait and Mobility Lab Assessment Inclusion Criteria: * Enrolled participant in the SJLIFE study. * At-risk for long lasting difficulties with walking or other aspects of mobility. * Participant is not currently pregnant. * Participant or their designee signs informed consent for Gait and Mobility Lab Assessment participation. Survivor/Control Exclusion Criteria: * Patient or control subject refuses to participate at any level of study Gait and Mobility Lab Assessment Exclusion Criteria: * Prospective participant or their designee declines participation in the Gait and Mobility Lab Assessment.