ORPHA:1436
X-linked skeletal dysplasia-intellectual disability syndrome
Also known as: Christian syndrome
Query health: suspect — Only one of 2 strategies returned hits (phrase).
Publications
604
Trials
0
Interventional, condition-specific
Researchers
943
Distinct authors in sample
Gene link
—
Readiness
2/6
Stages with a signal
Clinical definition (Orphanet)
A rare spondylodysplastic characterized by skeletal anomalies, including short stature, ridging of the metopic suture, a fusion of cervical vertebrae, thoracic hemivertebrae, scoliosis, sacral hypoplasia and short middle phalanges. Patients also had a moderate and abducens palsies. Glucose intolerance and imperforate anus were also described. There have been no further descriptions in the literature since 1977.
How rare: <1 / 1 000 000 — fewer than one in a million. In a city the size of Kolkata, that might mean on the order of fifteen people.
Cross-references
Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.
- MONDO:0010668
- MeSH:C564101
- OMIM:309620
- UMLS:C1839729
Additional Mondo synonyms (1)
mental retardation-skeletal dysplasia
Research stages
Trial readiness signals
Where this condition sits on an open-data research pipeline — not how close a treatment is, and not medical advice. Empty stages often mean “not in these databases under this Mondo ID,” not “impossible.”
2/6 stages with a signal
No specific-condition interventional trial, but broader-category trials exist — discuss eligibility with a clinician.
- Gene identifiedNot found
No GenCC disease–gene assertion in this build
- LiteraturePresent
604 matched papers (46 in last 10 years) Source
- Phenotype characterisedNot checked
Not yet enriched from Monarch / HPO
- Animal modelNot checked
Not yet enriched from Monarch / Alliance
- Orphan designationNot checked
FDA/EMA orphan-drug designation not enriched yet
- Interventional trialPartial
None under the specific name; 1 for broader category skeletal dysplasia
Biology
Genes and phenotypes
Gene–disease validity from GenCC, plus phenotypes and animal models joined from Monarch Initiative via Mondo ID — not a clinical diagnosis aid.
Do we know what causes it?
Not yet — the cause hasn't been pinned down in GenCC.
No strong gene–disease assertion joined for this Orphanet entity.
Phenotypes (Monarch / HPO)
Not enriched in this build — Monarch phenotype joins were not run for this record.
Animal models (Monarch / Alliance)
Not enriched in this build.
Literature
Is anyone studying this?
604
604 papers have been published on this condition. That is a real research literature — still far smaller than common diseases (breast cancer: over 700,000 papers). Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=5449) is 41.
604 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 41 (publications denominator n=5449).
46 in the last 10 years · low confidence
Phrase hits: 604 · MeSH hits: 0
Who's working on it?
943
Distinct author names in 200 sampled papers — named people below.
Who's working on it?
No interventional trial matched this name; these authors publish on it in the sampled literature — a practical starting point for contact.
- 01Goldberg-Stern H3 papers · 2012
Felsenstein Research Center, Beilinson Medical Center, Petah Tiqva, Israel.
Papers in Europe PMC - 02
- 03Pedersen OB3 papers · 2023
Department of Clinical Immunology, Zealand University Hospital, Køge, Denmark.
Papers in Europe PMC - 04Abrami F2 papers · 1984Papers in Europe PMC
- 05Appicciafuoco A2 papers · 1984Papers in Europe PMC
- 06Bédi J2 papers · 1977Papers in Europe PMC
- 07Blanchet-Bardon C2 papers · 1982Papers in Europe PMC
- 08Caraballo R2 papers · 2021
Department of Neurology, Hospital de Pediatría "Prof. Dr. Juan P Garrahan", Buenos Aires, Argentina. Electronic address: robertohcaraballo@gmail.com.
Papers in Europe PMC - 09Chiavacci G2 papers · 1984Papers in Europe PMC
- 10Delmas PF2 papers · 1982Papers in Europe PMC
Clinical research
Is a treatment being tested?
0
interventional trials for this specific condition
No interventional trial testing a treatment matched this specific condition name on ClinicalTrials.gov (observational studies and pan-disease registries are listed separately when present). 1 trial are registered for skeletal dysplasia, the broader category — shown separately because they may or may not enrol this specific subtype.
Data as of 27 July 2026
No matched interventional trials. This is true for 73% of diseases in the trials denominator (5114 of 7003). Here are the researchers publishing on it.
low confidence · 36.5th percentile (trials denominator)
Recruiting interventional trials
From the matched ClinicalTrials.gov set
No interventional trial testing a treatment was found for this specific condition name on ClinicalTrials.gov.
1 interventional trial matched skeletal dysplasia, the broader category — listed below. Those studies are not counted in the condition-specific total.
Broader category: skeletal dysplasia
1
Interventional trials for the parent category, exclusive of NCT IDs already counted above. Eligibility for this subtype is not guaranteed.
Worth raising with a clinician. How we count trials.
Where to find support
We do not yet link condition-specific patient organisations. These umbrella groups support undiagnosed and ultra-rare families:
India — NPRD
Last verified 2026-07-26This ORPHAcode is not on our curated NPRD list (direct or Mondo-parent match). That does not decide clinical eligibility; families in India should ask a notified Centre of Excellence about current coverage.
Hand-curated for this project. ORPHAcode mappings are best-effort and may be incomplete or imprecise for umbrella categories. Parent (Mondo) matches mean the policy lists a broader category — confirm eligibility with a Centre of Excellence. Financial entitlements summarised from public policy statements and may change. This is not official government guidance.
How we counted this
Europe PMC query (preferred label + any corrected label + Orphanet and Mondo exact synonyms, stoplisted; unioned with resolved MeSH labels when available). UMLS / OMIM / NCIT cross-references are stored on the overview but are not added to the query string.
"X-linked skeletal dysplasia-intellectual disability syndrome" OR "Christian syndrome" OR "mental retardation-skeletal dysplasia"
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"X-linked skeletal dysplasia-intellectual disability syndrome" OR "Christian syndrome" OR "mental retardation-skeletal dysplasia" OR "spondylodysplastic dysplasia"
Recall-expansion terms: spondylodysplastic dysplasia
Study-type breakdown: 0 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.
Parent-category trials query:
"skeletal dysplasia"
Query health: suspect — strategies attempted: phrase, recall-expansion; with hits: phrase
Run this search on ClinicalTrials.gov
Confidence reasoning
- Preferred label is multi-word and distinctive
- No synonyms dropped by stoplist
- No label/synonym collisions with other diseases in this corpus
- Publication count (604) is implausibly high for prevalence class "<1 / 1 000 000" — treat as possible over-matching, not a measure of research intensity
Ingested 2026-07-26T17:19:53.347Z