Trisomy 13

Trisomy 13, also called Patau syndrome, results from extra chromosome 13 material. It can occur as full trisomy 13, mosaic trisomy, or partial or translocation trisomy. The chromosome result, anatomy, medical course, development, and support needs vary; the label alone does not predict one child's trajectory or determine which care options should be offered.1

Urgent needs and family-centred decisions

A newborn or child needs urgent assessment for breathing difficulty or color change, apnea, choking, poor responsiveness, a first or prolonged seizure, dehydration, or another sudden deterioration. Follow an existing emergency or seizure plan when one is available. Feeding, airway, heart, neurologic, infection, pain, and medication causes should be considered rather than attributing a change to trisomy 13.2

Trisomy 13 is associated with substantial medical complexity and a high risk of early death, but it should not be called uniformly “lethal” or used by itself to deny evaluation or treatment. Families may choose comfort-focused care, selected interventions, a time-limited trial, or intensive medical and surgical treatment. Shared decisions should address the child's specific anatomy and stability, likely benefits and burdens, uncertainty, family values and goals, and available expertise. Goals can change and should be revisited without requiring a family to defend a prior choice.2

When clinicians or institutions differ about an option, families should receive the reason, the available evidence, and access to ethics consultation, palliative care, a second opinion, or transfer discussion when feasible. Palliative care can accompany life-prolonging treatment; it is not limited to end-of-life care.2

Diagnosis and clinical uncertainty

Prenatal screening estimates chance; it is not a diagnostic result. Diagnostic testing uses fetal or postnatal chromosome analysis. Karyotype can distinguish free trisomy from a translocation and mosaicism may require additional sampling or testing when the clinical question remains. Chromosomal microarray can identify extra chromosome material but may not fully describe a balanced parental rearrangement. Genetics consultation can interpret the result and advise whether parental karyotypes would clarify recurrence risk.1

Possible findings include congenital heart disease, brain differences, cleft lip or palate, small or structurally different eyes, hearing or vision impairment, polydactyly, hypotonia, seizures, kidney or urinary anomalies, scalp defects, breathing instability, reflux, and feeding or swallowing difficulty. Presence and severity differ, including among people with mosaic or partial forms.1

Prenatal or newborn planning may involve genetics, maternal-fetal medicine or neonatology, cardiology, neurology, feeding specialists, palliative care, and the family's chosen supports. Ask what information the family wants, use neutral language, separate population data from predictions about this child, and document the agreed plan for birth, resuscitation, comfort, feeding, transport, and review.2

Ongoing care, communication, and participation

Routine preventive care, symptom evaluation, vaccination, and developmentally appropriate support should not be withheld solely because of trisomy 13. Follow-up can address the child's heart, breathing and sleep, seizures, hearing and vision, feeding and nutrition, reflux and constipation, growth, kidney health, mobility, positioning, pain, dental needs, and family wellbeing in line with current goals.2

Do not infer awareness, comfort, preferences, or quality of life from motor or speech impairment. Observe and document the person's individual responses to people, activities, discomfort, and calming strategies. Offer meaningful choices, allow response time, and treat changes in facial expression, movement, vocalization, gaze, physiology, and behavior as possible communication that needs confirmation.

Feeding decisions should integrate airway and swallowing safety, cardiac and respiratory endurance, cleft or oral anatomy, growth and hydration, pleasure, caregiver capacity, and family goals. Oral feeding, modified feeding, tube feeding, or combined approaches each have potential benefits and burdens. Coughing, choking, recurrent respiratory illness, prolonged or exhausting meals, dehydration, or poor growth warrants direct feeding and swallowing assessment.2

AAC

AAC is considered from functional need and participation, not from diagnosis, age, or a presumed level of understanding. Communication may combine facial expression, body movement, vocalization, touch, objects, partner-assisted scanning, photos or symbols, switches, and speech-generating technology. Hearing, vision, motor control, positioning, seizure state, fatigue, and response consistency should guide trials. Include reliable ways to indicate yes, no, stop, pain, comfort, social connection, and urgent needs; train partners and maintain a low-tech backup. For assessment, trials, funding, and implementation, use the AAC device acquisition guide.3

Prognosis and language

Population survival estimates differ by study population, medical complexity, and care provided, and they cannot forecast one child precisely. Discuss the range, the source and date of any estimate, and the uncertainty relevant to the child's current condition. Ask families how they describe their child and goals. Clinicians can explain foreseeable burdens without assigning a child's life a quality judgment or presenting one care pathway as morally preferred.2

Sources

1. MedlinePlus Genetics: Trisomy 13 — chromosome mechanisms, clinical variability, and inheritance.
2. Pyle et al. Guidance for Caring for Infants and Children With Trisomy 13 and Trisomy 18 — current American Academy of Pediatrics guidance on shared decisions, treatment options, and ongoing care (2025).
3. American Speech-Language-Hearing Association: Augmentative and Alternative Communication — individualized, multimodal AAC assessment without cognitive prerequisites.

Review boundary

This page cannot interpret prenatal screening, establish the chromosome mechanism, predict survival, choose a resuscitation or treatment plan, or remotely assess breathing, feeding, seizures, pain, or communication. Emergencies require immediate local assessment. Medical, surgical, nutrition, equipment, and communication decisions require shared review by qualified clinicians with the person and family.