In brief
This page is for families who have just learned that their child has a pathogenic variant in the TAOK1 gene and are preparing for a visit to the doctor – a pediatrician, a primary care physician, or a specialist. We know from experience that it is easy to forget everything during such a visit. That is why we have prepared a ready-made list of questions, together with a short explanation of why each one is worth asking and what you can expect. You can print it out and take it with you.
Remember: TAOK1-NDD is a very rare condition, scientifically described only in 2019. It is highly likely that your doctor will be encountering it for the first time – this is normal and does not reflect badly on the doctor. It is worth bringing the genetic test result to the appointment, along with materials about the condition (e.g., a printout of our “What is TAOK1?” page or the Unique guide – links in the sources).
“What exactly does my child’s genetic test result mean?”
Ask the doctor to go through the result with you: what the variant is called and whether it was classified as “pathogenic,” “likely pathogenic,” or “of uncertain significance” (VUS). This classification has real consequences – pathogenic and likely pathogenic variants are considered the cause of the disease, whereas a VUS requires more cautious interpretation and further follow-up. If anything in the report is unclear, you have every right to ask for an explanation in plain language.
“Will we get a referral to a genetic clinic?”
This is one of the most important questions to start with. Interpreting the variant, family counseling, and planning any testing of other family members are the tasks of a clinical geneticist. Your primary care physician or pediatrician does not need to be an expert on TAOK1 – their key role is to direct you to the right specialists.
“Should we, the parents, be tested?”
Yes – testing the parents is recommended, and it is worth asking about it directly. It establishes whether the child’s variant arose de novo (as a new change) or was inherited. The literature describes cases of the variant being inherited from a parent with very mild, previously unnoticed symptoms – TAOK1-NDD shows incomplete penetrance and variable expressivity. The parents’ test result has direct implications for assessing risk in future pregnancies.
“What is the risk that our next child will also be affected?”
If the variant arose de novo, the risk of recurrence is low, though not zero. If it was inherited from one of the parents, the risk of passing it on to each subsequent child is 50% (autosomal dominant inheritance). A precise, individual risk assessment should be carried out by a clinical geneticist – ask for this topic to be included in the genetic counseling plan.
“Has our child’s variant been submitted to the ClinVar database?”
Submitting variants to international databases such as ClinVar helps clinicians and families around the world interpret their results – and with a condition as rare as TAOK1-NDD, every documented case matters. Ask whether the laboratory that performed the test has submitted the variant, and if not – whether it can be done.
“How will our child’s development be monitored?”
Neurodevelopmental abnormalities – in various combinations: delayed motor development, delayed speech and language development, learning difficulties – occurred in 100% of described patients, although their severity varies greatly. Ask about a plan for regular developmental assessment: who will carry it out, how often, and which milestones will be observed. Systematic monitoring makes it possible to respond quickly when the child needs additional support.
“Will we get a referral for early developmental intervention?”
It is worth asking about this regardless of the child’s current condition. The earlier therapy begins, the better – and in the clinical picture of TAOK1-NDD, the areas that most often need support are motor development (hypotonia, joint laxity) and speech development. Ask what access to early intervention looks like where you live and what documents are needed.
“Should our child see a physiotherapist?”
Hypotonia (reduced muscle tone) occurred in 58% of patients in the largest described cohort, and joint hypermobility is a common feature of the condition – both can affect motor development. Ask for a referral for a physiotherapy/rehabilitation consultation and about which exercises you can safely do at home.
“When should speech therapy start, and what is augmentative and alternative communication (AAC)?”
Speech and language difficulties are among the most persistent symptoms of TAOK1-NDD – in studies, they continued in the majority of children assessed after the age of 3, even when motor development had caught up. Ask for an early referral to a speech and language therapist and about augmentative and alternative communication (AAC) – tools that allow a child to communicate before speech develops, and that support rather than hinder its development.
“How should we handle feeding difficulties?”
Feeding difficulties in the neonatal period and infancy are one of the most frequently recurring early symptoms; gastroesophageal reflux and other gastrointestinal problems have also been reported. If your child eats poorly, chokes, spits up, or gains weight slowly – say so directly and ask about a gastroenterology consultation or support from a feeding specialist, as well as a plan for monitoring growth and weight.
“Does our child’s large head circumference require investigation?”
Macrocephaly is one of the most common features of TAOK1-NDD (83% of patients in the 2025 cohort, in some children from birth). In imaging studies, enlargement of the ventricular system (ventriculomegaly) and other abnormalities were described in some patients, but in many individuals brain imaging is normal. Ask whether imaging (e.g., MRI) is indicated in your child’s case, who will regularly measure head circumference, and which symptoms should prompt you to contact a doctor urgently.
“Which neurological symptoms should we watch for? Is an EEG needed?”
Epileptic seizures in TAOK1-NDD are rare (4 out of 50 patients in the largest cohort), but it is worth knowing what they can look like and what to do if they occur. Ask your doctor which episodes should concern you (e.g., altered consciousness, unusual movements) and in what situation an EEG and a consultation with a pediatric neurologist would be indicated.
“Should our child have a heart check-up?”
Family materials based on the cases described so far (the Unique guide, 2025) mention isolated cases of heart defects in people with TAOK1-NDD. It is worth asking whether a cardiology consultation or an echocardiogram is indicated for your child – the doctor will decide based on the child’s examination.
“Should we monitor blood sugar levels?”
The most recent study (2025) described episodes of hypoglycemia as a new element of the clinical picture in some patients. Ask your doctor whether and when it is worth checking blood glucose, and which symptoms could indicate low blood sugar in your child.
“Our son has a TAOK1 variant – are additional examinations needed?”
The 2025 study described genital anomalies in some boys as a new element of the condition’s clinical picture. If you have a son, ask whether the pediatric examination will include an assessment in this respect and whether a urology or endocrinology consultation is needed.
“When and how should our child be assessed for autism spectrum disorder and ADHD?”
Autism spectrum disorder or autistic traits were described in approx. 31% of patients in the 2025 cohort; ADHD and other behavioral difficulties were also reported in some individuals. Early diagnosis opens the way to appropriate therapy. Ask who can carry out an assessment of social-communication development and when, and whom to turn to if you notice concerning signs.
“Who will coordinate our child’s care?”
Care in TAOK1-NDD is multidisciplinary – it may involve a geneticist, a neurologist, a physiotherapist, a speech and language therapist, a psychologist, a gastroenterologist, and others. In practice, the greatest challenge for families is often coordination: keeping track of appointments, the flow of documentation, and the consistency of recommendations. Ask directly who will act as the lead physician, and request a written summary of the care plan.
“How often should we come back for check-ups, and what should prompt us to get in touch sooner?”
Agree with your doctor on a specific rhythm of visits (e.g., well-child checks and developmental reviews) and a list of warning signs that require faster contact. Also ask where to go in an emergency and what to tell the staff about your child’s condition – with such a rare diagnosis, it is worth having a short note about TAOK1-NDD prepared to show at the hospital.
“Can the variant’s classification change? Should the result be periodically reinterpreted?”
Yes – variant classifications can change as new scientific data emerge, which is particularly important for variants of uncertain significance (VUS). Ask whether and when it is worth returning to the genetic clinic to request a reinterpretation of the result. Knowledge about TAOK1 is growing very quickly: only six years passed between the first description of the condition (2019) and the largest cohort study (2025).
“Where can we find reliable information and other families?”
Ask your doctor to point you to trusted materials – and feel free to share the ones you know. A free guide to TAOK1-NDD by the organization Unique (2025) is available for families, and our foundation brings together an international community of families from around the world – we will help you join the parent group. Contact with families who have walked the same path can be just as valuable as medical care.
Sources
All information on this page comes from peer-reviewed scientific publications and curated genetic databases:
- Elkhateeb N. et al. Expanding the phenotype and genotype spectrum of TAOK1 neurodevelopmental disorder and delineating TAOK2 neurodevelopmental disorder. Genetics in Medicine, 2025;27(3). https://www.gimjournal.org/article/S1098-3600(24)00282-X/fulltext
- van Woerden G.M. et al. TAOK1 is associated with neurodevelopmental disorder and essential for neuronal maturation and cortical development. Human Mutation, 2021;42(4). https://onlinelibrary.wiley.com/doi/full/10.1002/humu.24176
- Hunter J.M. et al. Inherited and de novo variants extend the etiology of TAOK1-associated neurodevelopmental disorder. Cold Spring Harbor Molecular Case Studies, 2022;8(2). https://pmc.ncbi.nlm.nih.gov/articles/PMC8958914
- Dulovic-Mahlow M. et al. De Novo Variants in TAOK1 Cause Neurodevelopmental Disorders. American Journal of Human Genetics, 2019. https://www.sciencedirect.com/science/article/pii/S0002929719301910
- OMIM
#619575— Developmental delay with or without intellectual impairment or behavioral abnormalities (DDIB). https://omim.org/entry/619575 - ClinGen — TAOK1 dosage sensitivity curation. https://search.clinicalgenome.org/kb/gene-dosage/HGNC:29259
- Unique — Rare Chromosome Disorder Support Group: TAOK1-related neurodevelopmental disorder (family guide, 2025). https://rarechromo.org/media/singlegeneinfo/Single%20Gene%20Disorder%20Guides/TAOK1-related%20neurodevelopmental%20disorder%20FTNW.pdf
This content is for informational purposes only and does not replace medical advice. Last updated: August 2026.