Genetic testing does not always provide a diagnosis or a single explanation.
There are different reasons a test may not give a clear answer. A genetic change may be found but its significance may be uncertain, testing may not identify a genetic cause with current knowledge, or a result may explain only part of what is happening.
For people who have already spent months or years seeking answers, this can mean uncertainty continues after testing.
A result that does not provide a diagnosis does not necessarily mean nothing was learned. Testing may still have ruled out a particular genetic change, made some explanations less likely or helped guide what should happen next.
These descriptions are broad guides. Your healthcare professional should explain the wording used in your own report and what it means in your situation.
Testing may identify a genetic finding that explains some of a person’s health or developmental features but not others.
Your healthcare team can explain which parts of the clinical picture the result may account for and whether other assessment or investigation is still needed.
A variant of uncertain significance, or VUS, is a genetic change where there is not currently enough evidence to know whether it is related to the health or developmental concerns being investigated.
A VUS is not a confirmed genetic diagnosis and should not, on its own, guide major healthcare decisions.
A VUS may remain uncertain, or its classification may change in either direction as new evidence becomes available.
In some situations, a genetics team may recommend testing selected biological relatives to help interpret the significance of the VUS. This may or may not provide additional evidence.
Ask the healthcare professional discussing your result:
VERIFIED EXTERNAL LINK: Centre for Genetics Education: Variants of uncertain significance →
Current genetic testing and genetic knowledge have limits.
An uninformative result means testing has not identified a genetic change that explains the health or developmental concerns using current knowledge and testing. This does not necessarily mean the condition is not genetic. Some genetic causes cannot yet be identified or interpreted with current testing and knowledge.
A result that does not identify a cause may still narrow the possibilities or make some explanations less likely.
Some people have a clinical diagnosis even when a genetic cause has not been found. Others remain undiagnosed.
An uninformative result does not mean the health, developmental or disability concerns are not real, that testing was unnecessary, or that a future answer will never be possible.
Centre for Genetics Education: When a genetic cause is not found →
Genetic knowledge and testing technologies continue to change.
Review of an uncertain or uninformative result may become useful if new information becomes available about a variant, gene or condition, if your health or family history changes, or if different testing becomes available.
Depending on the circumstances, review may involve reinterpreting an existing result, reanalysing genomic data, considering broader testing, or using a different testing technology.
Ask your genetics team:
Practices vary between laboratories and genetics services. Do not assume that a result will automatically be reanalysed or that you will automatically be contacted if genetic knowledge changes.
Another genetics review may be worth discussing if:
Keep a copy of your original genetic test report and clinic letter. They record exactly what was tested and what was known at the time, which can matter if the result is revisited years later. You do not need to keep checking genetic databases or research yourself. Ask the genetics service how future review or recontact works and who to contact if something changes.
Not having a genetic diagnosis does not make your health, developmental, disability or support needs less real.
You may already be managing symptoms, appointments, therapies, disability or practical support needs without one diagnosis that explains everything. For some people and families, one of the hardest parts is continuing to make decisions without a clear prognosis or pathway, while having to explain the same history to different clinicians and services.
Adults who remain undiagnosed may be carrying years of symptoms, referrals or uncertainty while managing work, relationships, caring responsibilities or decisions about the future. Parents and carers may be coordinating care and advocating for a child without a diagnostic label. These experiences are different, but both deserve recognition and support.
Your experience and observations matter, even when the underlying cause is not yet known.
Care can still focus on what is happening now. You can ask:
The pace of any further search for answers can change over time. Some people want to keep pursuing a diagnosis. Others need a break or decide to revisit testing only if something changes.
You can step back from the search for answers and return to it later if that is what you need, or if new clinical information, testing or circumstances make another review useful.
You do not need a confirmed diagnosis to benefit from connection with others.
An exact condition group may not yet exist, or you may not know which diagnosis fits. Broader rare-disease and undiagnosed communities can provide practical information, shared experience and connection without requiring a specific diagnostic label.
Some people want this connection straight away. Others do not. You can use as much or as little as is helpful.
Uncertainty can affect emotional wellbeing, relationships and decisions about the future. It may also sit differently for adults, parents, carers and other family members, and not everyone will experience it in the same way.
If you or someone in your family would like support, this might include counselling or mental health support, carer or peer support, or help talking through uncertainty, relationships or future decisions.
Rareminds has a dedicated Wellbeing Hub for people living with rare conditions and their families, including support around uncertainty, the search for answers, relationships, family life and navigating healthcare.
Its information may be useful whether you have a diagnosis, an uncertain result or no clear genetic answer.
Explore the Rareminds Wellbeing Hub →
Rareminds is based in the UK. Its rare-specific wellbeing information can be useful to Australian families, but information about UK health services or crisis support may not apply in Australia.
For Australian rare-disease information and service pathways:
RARE Portal: Mental health and wellbeing support for Australians living with a rare disease →
Further investigation may sometimes include another genetics review, reanalysis, different testing, an undiagnosed disease program or a research study. These are options rather than expected next steps, and they may not provide a diagnosis.
Your genetics team can discuss whether any further clinical or research pathway is currently relevant, how referral works and what eligibility requirements may apply.
GAA can help you find information about known programs, registries and research opportunities and prepare questions for your healthcare team. GAA does not assess eligibility or arrange research testing.
For general information about what taking part in a clinical trial can involve:
Genetic Alliance Australia’s Genetic Health Navigator service provides free, community-based information and supportive navigation for people affected by genetic, rare and undiagnosed conditions.
We can help you:
Genetic Health Navigators do not diagnose, provide medical advice, arrange testing or interpret individual clinical results.
