Genomic sequencing and multigene panel tests are moving rapidly into clinical practice for a range of indications, but the evidence to guide appropriate use is currently limited. Well-crafted advice is needed to reduce unjustified practice variation, minimize risk of error and harm to patients, and encourage best practices. In the absence of definitive evidence, provisional advice can be helpful if it clarifies the potential benefits and risks of different courses of action and identifies the knowledge gaps most important to address in future research. This paper proposes an evolutionary process starting with clinical practice advisory documents (CPADs) and culminating in clinical practice guidelines (CPGs), using two case examples to illustrate the need for this process. When evidence is limited, CPADs can clarify current practice options and identify key knowledge gaps. Added evidence can then support updates to the CPADs over time. Ultimately CPADs can provide the foundation for definitive CPGs as the evidence base matures. This approach addresses an important challenge in genomics and may be applicable to other fields in which technology and practice are outpacing evidence generation.
Keywords: clinical practice guidelines; evidence; genomic medicine; genomics; practice advice.