Next-generation sequencing (NGS) is increasingly being used in cancer care to identify both somatic tumor driver mutations that can be targeted for therapy, and heritable mutations in the germline associated with increased cancer risk. This report presents a case of a JAK2 V617F mutation falsely identified as a duodenal cancer mutation via NGS. The patient was found to have a history of polycythemia vera, a disorder with a high incidence of JAK2 somatic mutations. Buccal cell DNA showed heterozygosity for the mutation, suggesting that it was potentially germline. However, subsequent resequencing of tumor, adjacent normal tissue, and fingernail DNA confirmed the mutation was somatic, and its presence in tumor and buccal cells resulted from contaminating blood cells. This report highlights important nuances of NGS that can lead to misinterpretation of results with potential clinical implications.
Justin Lee, Jennifer Axilbund, W. Brian Dalton, Daniel Laheru, Stanley Watkins, David Chu, Karen Cravero, Berry Button, Kelly Kyker-Snowman, Ian Waters, Christopher D. Gocke, Josh Lauring, and Ben Ho Park
Mary B. Daly, Robert Pilarski, Jennifer E. Axilbund, Saundra S. Buys, Beth Crawford, Susan Friedman, Judy E. Garber, Carolyn Horton, Virginia Kaklamani, Catherine Klein, Wendy Kohlmann, Allison Kurian, Jennifer Litton, Lisa Madlensky, P. Kelly Marcom, Sofia D. Merajver, Kenneth Offit, Tuya Pal, Boris Pasche, Gwen Reiser, Kristen Mahoney Shannon, Elizabeth Swisher, Nicoleta C. Voian, Jeffrey N. Weitzel, Alison Whelan, Georgia L. Wiesner, Mary A. Dwyer, and Rashmi Kumar
During the past few years, several genetic aberrations that may contribute to increased risks for development of breast and/or ovarian cancers have been identified. The NCCN Guidelines for Genetic/Familial High-Risk Assessment: Breast and Ovarian focus specifically on the assessment of genetic mutations in BRCA1/BRCA2, TP53, and PTEN, and recommend approaches to genetic testing/counseling and management strategies in individuals with these mutations. This portion of the NCCN Guidelines includes recommendations regarding diagnostic criteria and management of patients with Cowden Syndrome/PTEN hamartoma tumor syndrome.
Mary B. Daly, Jennifer E. Axilbund, Saundra Buys, Beth Crawford, Carolyn D. Farrell, Susan Friedman, Judy E. Garber, Salil Goorha, Stephen B. Gruber, Heather Hampel, Virginia Kaklamani, Wendy Kohlmann, Allison Kurian, Jennifer Litton, P. Kelly Marcom, Robert Nussbaum, Kenneth Offit, Tuya Pal, Boris Pasche, Robert Pilarski, Gwen Reiser, Kristen Mahoney Shannon, Jeffrey R. Smith, Elizabeth Swisher, and Jeffrey N. Weitzel
Mary B. Daly, Robert Pilarski, Jennifer E. Axilbund, Michael Berry, Saundra S. Buys, Beth Crawford, Meagan Farmer, Susan Friedman, Judy E. Garber, Seema Khan, Catherine Klein, Wendy Kohlmann, Allison Kurian, Jennifer K. Litton, Lisa Madlensky, P. Kelly Marcom, Sofia D. Merajver, Kenneth Offit, Tuya Pal, Huma Rana, Gwen Reiser, Mark E. Robson, Kristen Mahoney Shannon, Elizabeth Swisher, Nicoleta C. Voian, Jeffrey N. Weitzel, Alison Whelan, Myra J. Wick, Georgia L. Wiesner, Mary Dwyer, Rashmi Kumar, and Susan Darlow
The NCCN Guidelines for Genetic/Familial High-Risk Assessment: Breast and Ovarian provide recommendations for genetic testing and counseling and risk assessment and management for hereditary cancer syndromes. Guidelines focus on syndromes associated with an increased risk of breast and/or ovarian cancer and are intended to assist with clinical and shared decision-making. These NCCN Guidelines Insights summarize major discussion points of the 2015 NCCN Genetic/Familial High-Risk Assessment: Breast and Ovarian panel meeting. Major discussion topics this year included multigene testing, risk management recommendations for less common genetic mutations, and salpingectomy for ovarian cancer risk reduction. The panel also discussed revisions to genetic testing criteria that take into account ovarian cancer histology and personal history of pancreatic cancer.