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. 2016 Oct;18(10):1011-9.
doi: 10.1038/gim.2015.207. Epub 2016 Feb 11.

Oncologists' and Cancer Patients' Views on Whole-Exome Sequencing and Incidental Findings: Results From the CanSeq Study

Free PMC article

Oncologists' and Cancer Patients' Views on Whole-Exome Sequencing and Incidental Findings: Results From the CanSeq Study

Stacy W Gray et al. Genet Med. .
Free PMC article


Purpose: Although targeted sequencing improves outcomes for many cancer patients, it remains uncertain how somatic and germ-line whole-exome sequencing (WES) will integrate into care.

Methods: We conducted surveys and interviews within a study of WES integration at an academic center to determine oncologists' attitudes about WES and to identify lung and colorectal cancer patients' preferences for learning WES findings.

Results: One-hundred sixty-seven patients (85% white, 58% female, mean age 60) and 27 oncologists (22% female) participated. Although oncologists had extensive experience ordering somatic tests (median 100/year), they had little experience ordering germ-line tests. Oncologists intended to disclose most WES results to patients but anticipated numerous challenges in using WES. Patients had moderately low levels of genetic knowledge (mean 4 correct out of 7). Most patients chose to learn results that could help select a clinical trial, pharmacogenetic and positive prognostic results, and results suggesting inherited predisposition to cancer and treatable noncancer conditions (all ≥95%). Fewer chose to receive negative prognostic results (84%) and results suggesting predisposition to untreatable noncancer conditions (85%).

Conclusion: The majority of patients want most cancer-related and incidental WES results. Patients' low levels of genetic knowledge and oncologists' inexperience with large-scale sequencing present challenges to implementing paired WES in practice.Genet Med 18 10, 1011-1019.

Trial registration: NCT02127359.


Figure 1
Figure 1
Oncologists' attitudes regarding return of genomic test results (n=27, %). Return based on clinical utility (Panel A), clinical validity (Panel B), and all results (Panel C).
Figure 2
Figure 2. Patients' preferences for the return of somatic and germline WES results

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