251. Implementation and evaluation of clinical exome sequencing in childhood cancer care: The BASIC3 study
- Author
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Uma Ramamurthy, Stacey L. Berg, Donald W. Parsons, Robin A. Kerstein, Richard A. Gibbs, Angshumoy Roy, Susan G. Hilsenbeck, Yaping Yang, Christine M. Eng, David A. Wheeler, Dolores Lopez-Terrada, Sharon E. Plon, Laurence B. McCullough, Richard L. Street, Sarah Scollon, Murali Chintagumpala, Amy L. McGuire, and Federico A. Monzon
- Subjects
Cancer Research ,medicine.medical_specialty ,Oncology ,business.industry ,Childhood cancer ,medicine ,Intensive care medicine ,business ,Pediatric cancer ,Exome sequencing - Abstract
10023 Background: Advances in sequencing technologies allow for provision of genome-scale data to oncologists and geneticists caring for pediatric cancer patients. The goal of the BASIC3 (Baylor Advancing Sequencing into Childhood Cancer Care) study is to determine the clinical impact of incorporating CLIA-certified tumor and constitutional exome sequencing into the care of children with newly diagnosed solid tumors. Methods: Blood and frozen tumor samples obtained at initial surgery are submitted for clinical exome sequencing (target enrollment 280 patients). Results are deposited into the electronic medical record and disclosed to families by their oncologist and a genetic counselor. Identification of germline cancer susceptibility mutations is compared with standard testing practices. Oncologists are surveyed on prioritization of treatment options in the hypothetical event of tumor recurrence before and after receiving tumor exome results. Patients will be followed for two years to assess the clinical utility of exome data. Preferences for reporting this complex information are obtained by interviews and audiorecording of disclosure visits. Results: Initial results reveal that41 of 49 (84%) ethnically diverse families have consented to enroll on study. Adequate tumor samples were available from 35 of 41 patients (85%), including 11 of 15 (73%) patients with CNS tumors and 24 of 26 (92%) with non-CNS tumors. Pathogenic germline cancer susceptibility mutations (TP53, MSH2) were reported in 2 of the first 11 patients, with a medically-actionable mutation in a gene (SCN5A) unrelated to cancer in 1 patient and 0-4 (median of 2) recessive carrier mutations per patient. Between 9 and 33 protein altering mutations (median of 11) have been identified in tumors, including known cancer genes such as TP53 and others with no known link to pediatric cancer. Conclusions: A robust clinical pipeline for exome sequencing of blood and tumor samples has been successfully developed with significant parental interest. Data assessing the clinical utility of both the tumor and constitutional exomes and the preferences of oncologists and parents for reporting of these results are under study. Supported by NHGRI 1U01HG006485.
- Published
- 2013
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