Whole-genome and whole-exome sequencing in hereditary cancer: impact on genetic testing and counseling.

The incorporation of whole-genome and whole-exome sequencing into clinical practice will undoubtedly change the way genetic counselors and other clinicians approach genetic testing. Enabling the analysis of essentially all human genes in one comprehensive test, this new technology can result in reduced testing cost and time to diagnosis. Another consequence of this broad scope, however, is the increased amount, complexity, and variety of results a clinician may need to discuss with a patient. The purpose of this article is to review the technology and outline some of the benefits and challenges of whole-genome and whole-exome sequencing in hereditary cancer practice.