Cleft palate–short stature–vertebral anomalies syndrome is a very rare genetic condition. It affects many parts of the body at the same time. Children are born with a cleft palate (an opening in the roof of the mouth), they are shorter than expected, and they have problems in the bones of the spine (vertebrae). The face often looks a bit different, and some children have learning or thinking difficulties. It is a life-long condition, but with good medical and social support many people can still have a reasonable quality of life.
Cleft palate–short stature–vertebral anomalies syndrome is an extremely rare genetic condition that affects more than one body system. A person is usually born with a cleft palate (an opening in the roof of the mouth), grows shorter than expected (short stature, often with a short neck), and has vertebral (spine) changes that can lead to an uneven back, stiffness, pain, or scoliosis (sideways curve of the spine). Some reports also describe a “typical face shape” and learning or intellectual challenges, but information is limited because very few cases have been described in medical literature. [1]
Doctors believe it is passed in an autosomal dominant way. This means a change (mutation) in just one copy of a gene can be enough to cause the syndrome. In the medical literature, only a very small number of people have been described, mainly a father and his son in the first report, so information is limited and based on these rare cases.
Because so few patients have been reported, doctors group it as a “multiple congenital anomalies syndrome.” This means several birth defects happen together in a pattern: cleft palate, short neck and body, unusual facial shape, spine changes, and difficulties with learning and development.
Other names
Doctors and books may use different names for the same syndrome. Knowing these other names can help when searching information.
Mathieu–De Broca–Bony syndrome
This is the main alternative name. It comes from the names of the doctors who first described the family with this condition in 1993. The name reminds us that the syndrome is based on a very small number of patients.
Cleft palate with short stature and vertebral anomaly syndrome
This name explains the three main features: cleft palate, low height, and abnormal vertebrae in the spine. It is a simple descriptive name often used in genetic databases.
Cleft palate–short stature–vertebral anomalies (CPSSV)
Some scientific and test-catalog sites use a short form or code. “CPSSV” is a useful abbreviation when doctors order genetic testing or write notes.
Types
There are no official “types” of this syndrome, because only a few people have been reported. However, to understand how patients might differ, doctors sometimes think in terms of clinical patterns. These patterns are based on how strong the features are, not on different genes.
1. Classic familial type
In this pattern, more than one family member is affected, as in the original report of a father and son. Both have cleft palate, short neck, short body, spine problems, and learning difficulties. This pattern supports a clear autosomal dominant inheritance.
2. Possible sporadic (new mutation) type
In theory, a child could have the same group of features but no other family member is affected. This would suggest a new gene change in the egg or sperm. No clear cases have been fully reported yet, but this pattern is expected for autosomal dominant disorders.
3. Mild phenotype pattern
Some individuals might have a cleft palate and short stature, but only mild spine changes and almost normal learning. They would still need careful follow-up, because even mild spine anomalies can affect posture, pain, and movement later in life.
4. More severe multisystem pattern
In a more severe pattern, the child may have marked spine deformities, clear facial differences, serious feeding and speech problems, and more obvious learning difficulties. This group usually needs the most surgery, rehabilitation, and school support.
Causes (mechanisms and risk factors)
For this syndrome, the main proven cause is a change in the genetic material (DNA). Many of the points below describe how such changes can happen in general. Most are possible mechanisms or risk factors, not individually proven for this exact ultra-rare syndrome, but they help explain how such a condition can arise.
1. Autosomal dominant gene mutation
A harmful change in one gene copy is enough to cause the syndrome. The exact gene is still unknown, but patterns in the reported family strongly suggest autosomal dominant inheritance.
2. De novo (new) mutation in the egg or sperm
Sometimes the gene change appears for the first time in the child. It is not found in either parent’s usual body cells. This can happen by chance during cell division before conception.
3. Inherited mutation from an affected parent
If a parent has the syndrome, each child has about a 50% chance to inherit the changed gene. This matches the pattern seen in the original father–son report.
4. Germline mosaicism in a parent
A parent may appear healthy but carry the mutation in some of their egg or sperm cells. This is called germline mosaicism. It can lead to more than one affected child in a family even when parents look normal.
5. Errors in DNA copying or repair
During early cell division, the DNA sequence can be copied with small mistakes. If these mistakes hit an important gene for palate, growth, or spine development, a syndrome like this can appear.
6. Chromosome structural change (rearrangement or microdeletion)
In some people with combined cleft palate, short stature, and vertebral problems, doctors have found small missing pieces of chromosomes (microdeletions) or other rearrangements. These show that changing gene dosage in a region can create similar patterns, even if not exactly this named syndrome.
7. Family history of similar features
When several relatives have cleft palate, spine anomalies, or short stature, it suggests an inherited genetic factor. The named syndrome may represent one very specific family pattern on top of broader genetic risks.
8. General background polygenic risk
Many small genetic variants together may slightly disturb palate and spine development. When a strong single mutation is also present, these background variants may change how severe the syndrome looks (variable expressivity).
9. Epigenetic changes
Chemical tags on DNA or on histone proteins can turn genes on or off. Changes in epigenetic marks during early embryo life might modify how palate, bones, and brain develop, and might interact with the main gene mutation.
10. Advanced paternal age
In general genetics, older fathers have a higher chance of new mutations in sperm. This is a background risk factor for many autosomal dominant conditions, though not proven specifically for this syndrome.
11. Advanced maternal age
Older mothers have a higher chance of chromosome problems in the egg. While no specific chromosomal cause is confirmed here, this general risk may still modestly increase the chance of complex birth defects.
12. Maternal nutritional problems (for example low folate)
Lack of folate and some vitamins in early pregnancy is linked to orofacial clefts in general. This is not proven for this exact syndrome but is an important modifiable risk for cleft palate overall.
13. Maternal smoking or alcohol exposure
Smoking and heavy alcohol use in pregnancy are known risk factors for cleft lip/palate and poor growth. They may worsen the expression of an existing genetic problem, although they do not by themselves define this syndrome.
14. Maternal chronic illnesses (for example diabetes)
Poorly controlled diabetes in pregnancy can increase the risk of birth defects, including facial and spine defects. It may interact with genetic susceptibility but has not been specifically shown in this rare syndrome.
15. In-utero exposure to certain medicines or chemicals (teratogens)
Some medicines, radiation, and industrial chemicals can harm the embryo and affect bone and palate formation. For this syndrome, the main cause is still genetic, but harmful exposures may worsen the overall picture.
16. In-utero infections affecting growth
Serious infections during pregnancy can disturb growth and brain development. While not known to cause this specific syndrome, they may add to growth delay and learning difficulties in an already vulnerable fetus.
17. Changes in growth hormone or IGF-1 pathways
Some patients with syndromic short stature have changes in growth hormone or insulin-like growth factor pathways. In this syndrome, short stature is usually structural and genetic, but hormonal pathways may still influence final height.
18. Disturbed vertebral segmentation pathways
Genes that guide how vertebrae form and separate can, when altered, cause vertebral anomalies and short neck or trunk. These pathways are likely involved in this syndrome, even if the exact gene is not yet identified.
19. Interaction of multiple developmental pathways
Palate, face, spine, and brain all develop from closely related embryonic tissues. A single mutation can disturb several pathways at once, leading to a multi-system syndrome like this one.
20. Unknown and still-unidentified factors
Because so few people have been reported and the gene has not been clearly mapped, many details about the cause remain unknown. Ongoing research in cleft and skeletal syndromes may one day reveal the precise mechanism.
Symptoms (clinical features)
The following symptoms are drawn mainly from the original family report and from rare-disease databases. Not every person will have every symptom, and severity can differ between people, even in the same family.
1. Cleft palate
The roof of the mouth has a gap or opening. This can cause milk or food to leak into the nose, make feeding hard, and later affect speech sounds. It usually needs surgery in early childhood and speech therapy later.
2. Short stature
Children grow more slowly and end up shorter than most other children of the same age and sex. The shortness is often related to spine and bone structure, not just hormones. Regular growth plotting is important.
3. Short neck
The neck looks short and may be slightly stiff. This can be due to vertebral abnormalities in the neck region and altered alignment. In some cases, neck movement is limited, which may affect posture and comfort.
4. Vertebral anomalies
The bones of the spine may be fused, misshaped, or placed incorrectly. These changes can cause scoliosis (curved spine), neck stiffness, or back pain as the child grows. They need monitoring by orthopedics.
5. Facial asymmetry
One side of the face may look slightly different from the other. This asymmetry may involve the jaw, cheeks, or eye openings. It may be mild but can affect bite, vision alignment, or self-image.
6. Inner epicanthal folds
There may be small folds of skin at the inner corners of the eyes. These folds give a characteristic eye shape. They do not usually harm sight but contribute to the recognizable facial pattern.
7. Short nose with up-turned (anteverted) nostrils
The nose may appear short, and the nostrils may tilt slightly upward. This adds to the specific facial look described in the original cases. The change is usually cosmetic, but ENT review helps rule out airway issues.
8. Low-set, backward-oriented ears
The ears may sit a bit lower on the head and point slightly backward. Hearing can be normal, but ear shape and repeated middle ear infections are common in children with cleft palate.
9. Thin upper lip
The upper lip may look narrow and thin. Together with the small jaw, this gives a particular mouth shape. It usually does not affect function but is part of the syndrome’s facial pattern.
10. Micrognathia (small lower jaw)
The lower jaw is smaller and may sit further back. This can cause crowding of teeth, bite problems, and sometimes breathing or feeding problems when the baby lies on the back.
11. Intellectual disability or learning difficulties
Some affected people have delayed milestones and may need extra help with school learning. The level can range from mild to moderate, based on the limited reported cases. Early developmental support is important.
12. Delayed speech and language
Because of the cleft palate and possible learning issues, speech often develops later. Speech may sound nasal, and some sounds may be hard to pronounce. Early palate repair and speech therapy can improve outcomes.
13. Feeding difficulties in infancy
Babies may have trouble sucking and swallowing due to the cleft palate and small jaw. They may need special bottles or feeding techniques and sometimes feeding-team or nutrition support.
14. Recurrent ear infections or hearing loss
Children with cleft palate often have fluid and infections in the middle ear. If not treated, this can reduce hearing and worsen speech and learning. Ear tubes and hearing checks are usually needed.
15. Postural problems and back pain later in life
As the child grows, vertebral anomalies can lead to abnormal posture or spinal curves. Some people may develop back or neck pain in adolescence or adulthood and may need physiotherapy or, rarely, surgery.
Diagnostic tests
Doctors use a mix of physical examination, manual tests, laboratory and pathology tests, electrodiagnostic tests, and imaging tests to confirm the syndrome and check its effects on the body. Because this condition is very rare, most testing follows general cleft-palate and skeletal-dysplasia guidelines.
A. Physical exam tests
1. Full general physical examination
The doctor looks at the whole body: height, weight, body proportions, facial shape, spine alignment, limb shape, and skin. They compare these findings with normal charts for age and sex, and with known patterns of this and similar syndromes.
2. Growth measurement and growth-chart plotting
Height, weight, and head size are measured and placed on standardized growth charts. Persistent values below the normal curves support the presence of short stature and help monitor response to nutrition or other interventions.
3. Detailed craniofacial examination
The doctor carefully inspects the face, jaw, mouth, and palate. They check for cleft palate, micrognathia, thin upper lip, nose shape, and eye folds. This pattern helps distinguish this syndrome from other cleft-palate syndromes.
4. Spine and posture examination
The doctor looks at the neck and back from the side and behind, asks the child to bend forward, and checks for curves, stiffness, or uneven shoulders or hips. This helps detect vertebral anomalies and scoliosis early.
B. Manual tests
5. Range-of-motion testing of neck and spine
The clinician gently moves the neck and spine through flexion, extension, and side-bending. Limited, painful, or uneven movement can point to fused or malformed vertebrae. These findings guide further imaging.
6. Neurological bedside examination of limbs
Strength, reflexes, and sensation in the arms and legs are checked by hand tools like a reflex hammer and simple touch tests. Abnormal findings may mean the spine changes are pressing on nerves.
7. Functional oral-motor assessment
Speech therapists or doctors observe how the child sucks, chews, swallows, and speaks. They may ask the child to move the tongue and lips in different ways. This shows how much the cleft palate and jaw shape affect feeding and speech.
8. Developmental and cognitive screening tests
Simple play-based tasks and questionnaires check gross motor, fine motor, language, and social skills. If delays are found, more detailed neuropsychological tests may follow. This helps plan early intervention and school support.
C. Laboratory and pathological tests
9. Basic blood tests (full blood count, biochemistry)
A full blood count and routine chemistry panel check for anemia, infection, and organ function. These tests do not diagnose the syndrome, but they are important before surgery and to rule out other causes of poor growth or fatigue.
10. Thyroid and other endocrine tests
Thyroid-stimulating hormone (TSH), free T4, and sometimes growth hormone–related tests are measured if growth is very slow. These tests check for treatable hormonal problems that can add to short stature.
11. Metabolic and nutritional tests (for example, vitamin and mineral levels)
Doctors may check vitamin D, calcium, folate, vitamin B12, and iron. Deficiencies can worsen growth, bone health, and learning, so it is important to identify and correct them.
12. Chromosomal microarray analysis
This test looks for small missing or extra pieces of chromosomes across the whole genome. It can detect microdeletions that may cause or modify complex syndromes with cleft palate and vertebral anomalies, and helps with genetic counseling.
13. Targeted or panel-based gene testing
If the clinical picture fits this syndrome or similar disorders, a gene panel for cleft palate and skeletal anomalies or whole-exome sequencing may be done. Finding a pathogenic variant confirms a genetic diagnosis and guides family screening.
D. Electrodiagnostic tests
14. Nerve conduction studies (NCS)
If there are signs of weakness, numbness, or unusual reflexes, doctors may test how fast and how well signals travel in the peripheral nerves. Abnormal results suggest nerve compression or damage related to spine changes.
15. Electromyography (EMG)
In EMG, a small needle records electrical activity in muscles at rest and during movement. This helps distinguish between muscle and nerve problems and can show if spinal anomalies are affecting motor pathways.
16. Brainstem auditory evoked potentials (BAEPs)
BAEPs measure the brain’s response to sound clicks. They can reveal early hearing-pathway problems, which are important in children with cleft palate and frequent ear infections. This test supports hearing assessments and speech-therapy planning.
E. Imaging tests
17. X-ray of the cervical spine and whole spine
Plain X-rays are often the first imaging test. They can show fused vertebrae, abnormal shapes, or curves in the cervical and thoracic spine, helping to document the vertebral anomalies that define the syndrome.
18. MRI of the spine
MRI gives a detailed picture of the spinal cord, discs, and soft tissues without radiation. It is useful when there are neurological signs or when surgeons are planning operations on the spine or neck.
19. Craniofacial CT or MRI (when needed)
Detailed imaging of the skull and face helps surgeons plan cleft palate repairs, jaw surgery, or airway procedures. CT shows bone very clearly; MRI shows soft tissue. These scans are used only when the benefit is clear because of radiation or sedation concerns.
20. Echocardiography and abdominal ultrasound
Although not core features, some complex congenital syndromes with cleft palate and short stature can have heart or kidney anomalies. An ultrasound of the heart and abdomen is often done once to look for hidden organ problems and to give a full baseline picture.