What is X-linked calvarial hyperostosis?
X-linked calvarial hyperostosis does not yet have FDA-approved treatments tracked on UniteRare.
Key symptoms:
Thickening of the skull bonesAbnormal head shapeEnlarged or prominent foreheadHeadachesPossible increased pressure inside the skullChanges visible on skull X-rays or CT scansFacial asymmetry in some cases
- Inheritance
- X-linked dominant
- Carried on the X chromosome; a single copy can cause the condition
- Age of Onset
- Variable
- Can begin at different ages, from infancy through adulthood
Treatments
Source: openFDA + DailyMed · NDA / BLA labels with structured indications · refreshed weekly
No FDA-approved treatments are currently listed for X-linked calvarial hyperostosis.
View clinical trials →Clinical Trials
View all trials with filters →Source: ClinicalTrials.gov · synced daily · phases, status, and PI names normalized at ingest
No actively recruiting trials found for X-linked calvarial hyperostosis at this time.
New trials open frequently. Follow this disease to get notified.
Specialists
View all specialists →Source: NPI Registry + PubMed · trial PI roles cross-referenced with ClinicalTrials.gov · ranked by match score (publications + PI activity + community signal)
No specialists are currently listed for X-linked calvarial hyperostosis.
Treatment Centers
8 centersSource: NORD Rare Disease Centers + NIH Undiagnosed Diseases Network (UDN) · centers verified active within last 12 months
Children's Hospital Colorado Rare Disease Program ↗
Children's Hospital Colorado
📍 Aurora, CO
👤 Boston Children's Hospital Rare Disease Program
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDBoston Children's Hospital Rare Disease Program ↗
Boston Children's Hospital
📍 Boston, MA
👤 Boston Children's Hospital Rare Disease Program
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
🏨 Children'sAnn & Robert H. Lurie Children's Hospital Genetics ↗
Lurie Children's Hospital
📍 Chicago, IL
👤 Boston Children's Hospital Rare Disease Program
🏥 NORDCincinnati Children's Hospital Medical Center ↗
Cincinnati Children's
📍 Cincinnati, OH
👤 Boston Children's Hospital Rare Disease Program
🏨 Children'sNationwide Children's Hospital Rare Disease Center ↗
Nationwide Children's Hospital
📍 Columbus, OH
👤 Boston Children's Hospital Rare Disease Program
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
Travel Grants
No travel grants are currently matched to X-linked calvarial hyperostosis.
Community
No community posts yet. Be the first to share your experience with X-linked calvarial hyperostosis.
Start the conversation →Latest news about X-linked calvarial hyperostosis
Source: PubMed + NIH RePORTER + openFDA + clinical-journal RSS · last 30 days · disease-tagged at ingest by AI extraction with human QC
No recent news articles for X-linked calvarial hyperostosis.
Follow this condition to be notified when news becomes available.
Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.How severe is the skull bone thickening in my case or my child's case?,Is there any risk of increased pressure inside the skull, and how will you monitor for it?,Will surgery be needed, and if so, when would it be recommended?,How often should imaging studies be repeated to track the condition?,Are there genetic implications for other family members, and should they be tested?,What symptoms should prompt me to seek emergency care?,Are there any clinical studies or research programs we could participate in?
Common questions about X-linked calvarial hyperostosis
What is X-linked calvarial hyperostosis?
X-linked calvarial hyperostosis is an extremely rare genetic bone disorder that primarily affects the skull (calvaria). In this condition, the bones of the skull grow thicker than normal, a process called hyperostosis. Because it follows an X-linked pattern of inheritance, the condition is caused by a genetic change on the X chromosome and tends to affect males and females differently. Males, who have only one X chromosome, are generally more severely affected, while females may have milder symptoms or be carriers. The main feature of this disease is abnormal thickening of the skull bones, wh
How is X-linked calvarial hyperostosis inherited?
X-linked calvarial hyperostosis follows a x-linked dominant inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
Frequently asked questions about X-linked calvarial hyperostosis
Auto-generated from canonical disease facts (Orphanet, OMIM, ClinicalTrials.gov, openFDA, NPPES). Not a substitute for clinical guidance.
What is X-linked calvarial hyperostosis?
X-linked calvarial hyperostosis is a rare disease catalogued in international rare-disease ontologies (Orphanet ORPHA:391327, OMIM 302030). It is typically inherited as x-linked dominant. Age of onset is generally variable. For verified primary sources, see the UniteRare X-linked calvarial hyperostosis page.
How is X-linked calvarial hyperostosis inherited?
X-linked calvarial hyperostosis follows x-linked dominant inheritance. Genetic counseling is recommended for affected families to understand recurrence risk in offspring and the likelihood of unaffected siblings being carriers. Variants in the underlying gene(s) may be identified via clinical genetic testing.
Are there FDA-approved treatments for X-linked calvarial hyperostosis?
Approved treatments for X-linked calvarial hyperostosis are tracked from openFDA and DailyMed primary sources. Many rare diseases have no specific FDA-approved therapy; for those, supportive care and management of complications form the basis of clinical care. Orphan-drug-designation status is noted where applicable.
Are there clinical trials for X-linked calvarial hyperostosis?
Active clinical trials for X-linked calvarial hyperostosis are tracked daily from ClinicalTrials.gov. Trial availability changes frequently; check the UniteRare trial listings for the current count and recruitment status. Sponsors of rare-disease research often welcome inquiries even when a trial is not actively recruiting at a given moment.
How do I find a specialist for X-linked calvarial hyperostosis?
Verified X-linked calvarial hyperostosis specialists are identified through ClinicalTrials.gov principal-investigator records, peer-reviewed publication authorship (via PubMed), and the NPPES NPI registry. NORD-designated Centers of Excellence and NIH-affiliated rare-disease clinics are also tracked. UniteRare's specialist directory is updated continuously as new evidence becomes available.
See full X-linked calvarial hyperostosis page for complete clinical details, sources, and verified-specialist listings.
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