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Cornelia de Lange syndrome (CdLS) is a genetically heterogeneous developmental condition with a spectrum ranging from classic features to milder or atypical presentations. Growth, limbs, hearing, vision, digestion, development, communication, and behavior can be affected in different combinations. A person's abilities and needs cannot be inferred from facial appearance or the diagnostic label. The international consensus statement provides multidisciplinary diagnosis and management guidance.
Urgent and procedure-related safety
Seek urgent assessment for breathing difficulty, color change, repeated choking, a first or prolonged seizure, sudden reduced responsiveness, dehydration, blood in vomit or stool, or severe abdominal pain or distension. Persistent forceful or green vomit also needs urgent evaluation rather than being attributed to reflux.
Pain, reflux, constipation, dental or ear disease, infection, sleep disruption, and communication frustration can appear as withdrawal, agitation, or self-injury. A new or marked behavior change should trigger medical, sensory, environmental, and communication review before it is treated as a behavioral diagnosis.
Airway anatomy, reflux and aspiration risk, congenital heart disease, and difficulty communicating pain may affect surgery or sedation planning. The procedural team should receive the person's airway, cardiac, feeding, medication, and communication history in advance.
Quick reference
| Topic | Condition-specific guidance |
|---|---|
| Clinical spectrum | Classic, nonclassic, and gene-related presentations vary substantially |
| Cause | Usually a pathogenic variant affecting cohesin function or regulation; inheritance and recurrence depend on the gene and family finding |
| Diagnosis | Clinical assessment plus molecular testing; mosaicism or an alternative diagnosis may be considered when suspicion remains |
| Communication | Expressive communication may be more affected than understanding, but each domain needs direct assessment |
| Feeding | Reflux, oral-motor differences, swallowing difficulty, aspiration, and structural gastrointestinal conditions may contribute |
| AAC | Consider early from functional need; feature-match language, sensory access, movement, and environments |
Recognition and diagnosis
Possible features include prenatal or postnatal growth difference, microcephaly, characteristic facial features, upper-limb or hand differences, developmental differences, hearing loss, reflux or feeding difficulty, and congenital heart, renal, genital, palate, or other structural findings. People with milder CdLS may lack the full classic pattern.
Diagnosis may be made from a characteristic clinical pattern and supported by molecular testing. Current testing commonly evaluates genes associated with CdLS and overlapping conditions; the laboratory strategy depends on the presentation and prior results. Mosaicism can affect detection, so genetics teams may consider another tissue or broader testing when clinical suspicion remains. A confirmed molecular result also informs family testing and counseling. See the recently revised CdLS GeneReview.
Coordinated care and follow-up
Initial and ongoing review should be tailored to identified findings. Relevant disciplines may include clinical genetics, primary care, gastroenterology, cardiology, neurology, audiology, ophthalmology, dentistry, orthopedics, urology or gynecology, rehabilitation, nutrition, sleep medicine, psychology, and speech-language pathology.
Care may address growth and nutrition, reflux and constipation, hearing and vision, seizures, sleep, pain, dental disease, cardiac and renal findings, puberty and reproductive health, movement, mobility, and participation. Surveillance schedules should follow the molecular and clinical profile rather than a generic syndrome checklist.
Speech, language, and interaction
Speech and expressive language may be more affected than receptive language or nonverbal reasoning. Hearing loss, palate or jaw differences, motor planning, breath support, pain, anxiety, sensory regulation, and limited access to communication can also influence performance. Spoken output should not be used as a proxy for comprehension or decision-making ability.
Assessment should include hearing, receptive and expressive language, speech, literacy, gesture, social interaction, motor access, and communication across familiar and unfamiliar partners. Allow response time, accept the person's communication forms, and provide a reliable way to express pain, refusal, consent, preferences, and the need for a break. Behavior support should include functional communication and evaluation of pain and sensory access.
Feeding and swallowing
Feeding difficulty may reflect reflux, dysphagia, aspiration, oral or structural differences, sensory responses, constipation, respiratory illness, or limited endurance. Concerning signs include coughing or choking, wet or changed voice, congestion with meals, recurrent chest illness, prolonged meals, distress, poor intake, or growth and hydration concerns.
Clinical feeding and swallowing assessment should consider posture, respiration, oral movement, endurance, mealtime interaction, and gastrointestinal symptoms. Instrumental assessment may be needed when swallowing physiology or aspiration risk remains unclear. Positioning, pacing, texture, reflux treatment, and oral or tube-feeding decisions require individual assessment and shared planning; nonspecific oral-motor exercises are not a substitute for diagnosis.
AAC and access planning
AAC can be introduced whenever speech does not meet communication needs in one or more settings. It does not require a cognitive, motor, behavioral, or age prerequisite and does not prevent speech development. A multimodal system may combine facial expression, gesture, sign, objects, pictures, writing, speech, and technology.
Feature matching should account for language and literacy, hearing, vision, upper-limb anatomy and movement, positioning, endurance, sensory preferences, and the person's chosen environments. Touch, adapted pointing, switches, eye tracking, partner-assisted scanning, tactile symbols, or other methods are possibilities to trial, not syndrome-based prescriptions. Provide robust vocabulary, partner training, and a portable low-tech backup. See the AAC assessment and acquisition guide and ASHA AAC Practice Portal.
Participation and prognosis
Educational and adult supports should be based on observed strengths, sensory access, communication, health, and personally meaningful goals. Plans may need accessible instruction, predictable transitions, rest, movement support, alternative task completion, and an explicit communication plan across home, school, work, health care, and community settings.
There is no single CdLS trajectory. Prognosis depends on the molecular finding, congenital and medical complications, sensory access, development, environment, and available supports. Follow-up should revisit previously unmet communication, hearing, feeding, pain, behavioral, and participation needs rather than assuming that change is part of the syndrome.