How do I know if I have Hajdu-Cheney Syndrome?

Hajdu-Cheney syndrome is an extremely rare genetic connective tissue disorder characterized by progressive bone loss, specifically acro-osteolysis (shortening of the fingers and toes), and distinct craniofacial features. If you suspect you have Hajdu-Cheney syndrome, you should consult a geneticist to discuss clinical symptoms and request molecular genetic testing for the NOTCH2 gene.

What are the early signs of Hajdu-Cheney syndrome?

The clinical presentation of Hajdu-Cheney syndrome often involves skeletal abnormalities that become apparent during childhood or early adulthood. Common indicators include a short stature, a distinct facial appearance (such as low-set ears or a small chin), and dental anomalies like premature loss of primary teeth. Because Hajdu-Cheney syndrome is systemic, patients may also notice joint hypermobility or chronic joint pain.

How can I perform a self-assessment for this condition?

While you cannot diagnose yourself, you can track patterns to share with your physician. Look for these specific features associated with Hajdu-Cheney syndrome:

• Progressive shortening or clubbing of the fingertips and toes (acro-osteolysis).


• Frequent or unexplained bone fractures.


• Delayed closure of the fontanels (soft spots) in infancy.


• Early-onset osteoporosis or low bone mineral density.


• Neurological symptoms, such as headaches, which may be caused by a basilar invagination (where the skull base presses on the spine).

When should I see a doctor and what tests are required?

If you notice the symptoms listed above, seek a referral to a clinical geneticist. When speaking with your primary care provider, clearly document your family history and specific physical changes. The gold standard for diagnosing Hajdu-Cheney syndrome is genetic testing to identify a heterozygous mutation in the NOTCH2 gene. Imaging studies, such as X-rays of the hands and feet, are also essential to document the characteristic bone resorption typical of Hajdu-Cheney syndrome.

Are there red flags requiring urgent care?

Seek immediate medical attention if you experience sudden, severe neck pain, dizziness, or weakness in your limbs. These may indicate neurological involvement, such as cervical spine instability or basilar invagination, which are serious complications of Hajdu-Cheney syndrome.

Next steps

• Consult a medical geneticist for a formal evaluation.


• Request a referral to a rheumatologist or endocrinologist to monitor bone health.


• Connect with the 5 members of the DiseaseMaps.org community living with this condition to share experiences.


• Maintain a detailed symptom diary to assist your diagnostic team.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Hajdu-Cheney syndrome.


• Orphanet: Acro-osteolysis, dominant type.


• OMIM (Online Mendelian Inheritance in Man): #102500 (NOTCH2 mutation).