Editorial draft for review. A variant of uncertain significance, or VUS, is a DNA change for which there is not enough evidence to determine whether it contributes to disease. It is not a positive diagnosis. Medical decisions generally should not be based on a VUS alone; your personal and family history still matter. Laboratories review population data, research, and observations from families. As evidence develops, a variant may be reclassified. Not every VUS will be reclassified, and timing cannot be predicted. Keep a copy of your report and ask how updates are communicated. Do not assume relatives need testing solely because you received a VUS; a genetics professional can explain when family studies may be informative. Educational information only; not individualized medical advice.