Children's Oncology Group
Somatic mosaicism in cancer associated genes is one potential explanation for discordance in childhood cancer that has not been fully explored to date. This pilot study will focus on twins with central nervous system (CNS) tumors who are identified through the Children's Oncology Group's Project: EveryChild (PEC) registry or volunteer.
PRIMARY OBJECTIVES: I. To conduct a descriptive study of same sex twins (MZ and DZ) discordant for childhood CNS tumors identified through the Children's Oncology Group Project:EveryChild registry. II. To compare the prevalence of somatic mosaicism in classic cancer-associated genes in monozygotic (MZ) twins discordant for childhood brain tumors. In our pilot study, we will sequence blood and saliva DNA samples from 25 MZ twin pairs using a panel of 94 known cancer associated genes. SECONDARY OBJECTIVES: I. To compare the profile of mutations detected in DNA extracted from pre- and post-tr…
Inclusion Criteria: * Newly diagnosed patient with CNS tumor or have recurrent disease and enrolled on APEC14B1. * Patient must have same sex twin. Note: (history of) treatment on a COG therapeutic trial is not required. * Patients must be diagnosed at \< 19 years of age at the time of diagnosis. * A family is eligible to participate if the twin with the CNS tumor is deceased but has a blood sample banked through APEC14B1. * All patients and/or their parents or legal guardians must provide informed consent. Assent will be obtained for participants between the ages of 8-17 years. * All institu…
Collection of both blood and saliva samples from participants at the time of study enrollment
The brief questionnaire will assess health history, demographics, environmental exposures, family history of cancer, and birth characteristics.
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