Optima WES Patient Information

There are three possible outcomes that may result from your exome analysis:

Some tests may also identify secondary findings, which are genetic changes unrelated to the original reason for testing but associated with conditions for which medical management, screening, or treatment options are available, as recommended by the American College of Medical Genetics and Genomics (ACMG). Receiving these results is optional.

Genetic results need to be read in the context of the person’s symptoms, medical history, and family history. When a clinically relevant variant is detected may help explain the condition, but it may still not predict exactly how severe the condition will be. When a no clinically relevant variant is detected may mean no answer was found yet, or that the cause lies in a part of DNA that this test does not read well. If the result is a VUS, more information from other family members, future research, or reanalysis may later help clarify its meaning.

Some common terms may appear when discussing WES. Diagnostic yield means how often the test finds an answer in people with a similar medical problem; for WES, that rate can vary a lot depending on why the test was ordered. Sensitivity means how well a test finds a true genetic change when it is really there. Specificity means how well a test avoids reporting a change that is not really present. These terms describe how the test performs, but they do not guarantee that the test will fully predict a person’s future symptoms or disease course.

WES is used for a wide range of health concerns that may have a genetic cause. These can include developmental delay, intellectual disability, epilepsy, congenital anomalies, autism with other medical features, and more complex conditions affecting several parts of the body. In pregnancy, exome sequencing is generally used more selectively, especially when ultrasound shows one or more structural differences and standard testing has not explained them.

WES is performed on a DNA sample, usually from blood, saliva, or amniotic fluid in pregnancy, testing may use a pregnancy-related sample such as amniotic fluid, depending on the clinical situation. The laboratory uses next-generation sequencing to read many genes quickly and compare them with a reference sequence. In some cases, testing the child or fetus together with the parents (trio) can help the lab interpret the findings more accurately.

WES is a powerful test, but it does not find the answer in every family. Clinical sources report that WES provides a diagnosis in roughly 20% to 50% of people with suspected Mendelian, or single-gene, disorders, and the chance of finding an answer depends on the person’s symptoms, the quality of the clinical information provided, and whether parental samples are included. In other words, WES can be very helpful, but a negative result is still possible even when a genetic cause exists.

WES has important limits. It mainly looks at the protein-coding parts of DNA, so it can miss disease-causing changes (known as variants) in other parts of the genome. It also cannot always tell whether a condition will happen, how severe it will be, or how it will change over time. For most people, the physical risk from the test itself is very small when only blood, saliva, or cheek cells are used; however, if prenatal testing requires procedures such as amniocentesis sampling, there is a small but real risk of miscarriage from the sampling procedure.

Genetic testing can affect more than just one person. Results may raise emotional questions, create uncertainty, or reveal information that matters to other family members as well. WES can also uncover secondary findings, which are unrelated to the original reason for testing, and some uncertain findings may remain unclear until more research becomes available. That is why counseling before and after testing is so important.

The laboratory usually sends a written report to the doctor or genetic counselor, who then explains it to the family. Genetic changes are commonly grouped into categories such as benign, likely benign, uncertain significance (VUS), likely pathogenic, and pathogenic. The final meaning of a result depends not only on the lab finding itself, but also on the person’s symptoms, medical history, and family history.

For most families, the process starts with a discussion with the treating doctor or a genetic counselor. After being informed for consent, a sample is collected from the patient and, in many cases, from the parents as well. The sample is sent to the laboratory, the data are analyzed, and the results are later reviewed in a follow-up appointment where the family can ask questions and discuss next steps.

WES is not just a laboratory technique; it is a medical test meant to be used together with professional clinical evaluation. Its value is highest when doctors provide clear information about symptoms, family history, and previous test results, and when families receive counseling about what the test may or may not show. This is especially important in pregnancy, where careful counseling before and after testing is strongly recommended.

For many families, the main value of WES is that it can help end a long search for answers. A result may confirm a diagnosis, guide monitoring or treatment decisions, reduce the need for more small step-by-step tests, and help families make informed decisions about future care and family planning. Even when the result is negative, it can still help doctors decide what other testing or follow-up may be most useful.