An approach for improvement of the accuracy of cancer gene panel testing.

BACKGROUND: Tissue-based comprehensive genomic profiling (CGP) is increasingly being employed for genotype-directed therapies in patients with advanced cancer. However, tissue availability may limit their potential applications. In Japan, the cost of cancer gene panel tests is covered by public insurance for patients diagnosed with advanced solid tumors once in their lifetime. Therefore, it is essential to improve the success rate (reportability) and accuracy of CGP tests. The purpose of this study was to identify the factors associated with efficient and accurate CGP testing using relevant information obtained from real-world data. METHODS: This study included 159 samples analyzed using tumor-only panel FoundationOne® CDx cancer genome profiling (F1CDx) and 85 samples analyzed using matched-pair panel OncoGuide™ NCC Oncopanel system (NCCOP) at St. Marianna University Hospital. Sample characteristics (fixation conditions, storage period, histology, tumor cell ratio, and genomic tumor cell content), CGP performance, and quality control status were evaluated across all 244 tested samples. RESULTS: In 237/244 samples (97.1%), CGP testing results were successfully obtained [F1CDx, 99.4% (158/159) and NCCOP, 92.9% (79/85)]. An increased number of fibroblasts, inflammatory cells, and necrotic tumor cells, long-term storage, and/or prolonged fixation of tissue sections were involved in the unreported results and/or qualified CGP results. In addition, a negative correlation between median insert size values and ΔΔCq was observed in the NCCOP system. CONCLUSION: We identified various factors associated with efficient and accurate CGP testing using relevant information obtained from real-world data, suggesting that thorough selection and preparation of tissue sections could optimize CGP and maximize useful information.

Human genetics education as part of the Japanese Cancer Education Comprehensive Support Project.

In Japan, cancer education has been initiated with children as a measure against cancer. Cancer genome medicine, which is a social implementation, includes aspects of genetic medicine. For this reason, it is assumed that content related to "genetics" is also necessary in cancer education. To investigate the actual situation regarding the teaching of genetics in cancer education, we conducted a questionnaire survey of schoolteachers involved in cancer education; these schoolteachers belonged to the model school of the Cancer Education Comprehensive Support Project. Regarding genetic content, we asked questions related to two aspects: "the molecular genetic mechanisms of cancer" and "the phenomenon of sharing cancer in the family." The results showed that about 60% of the teachers had experience teaching content related to the molecular genetic mechanisms of cancer and the phenomenon of sharing cancer in the family. While many teachers felt that teaching genetics in cancer education was necessary, they also felt that there were difficulties in doing so: 65.2% for content related to the molecular genetic mechanisms of cancer and 70.8% for that related to the phenomenon of sharing cancer in the family. It is important to properly treat cancer as a genetic disease, and it is necessary to examine government curriculum guidelines and establish a collaborative system among other subjects. In addition, the involvement of specialists in genetic medicine and psychosocial support is expected to improve teachers' genetic literacy as well as to communicate with students with consideration for their family history.