ORPHA:85324
X-linked intellectual disability, Shrimpton type
Also known as: MRXS9
Query health: suspect — Only one of 2 strategies returned hits (phrase).
Publications
2
2.3th percentile
Trials
0
Interventional, condition-specific
Researchers
4
Distinct authors in sample
Gene link
—
Readiness
2/6
Stages with a signal
Clinical definition (Orphanet)
An X-linked syndromic characterised by severe , microcephaly and short stature in male patients. Strabismus and spastic diplegia have also been described.
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:0010409
- MeSH:C567474
- OMIM:300709
- UMLS:C2678039
Additional Mondo synonyms (2)
intellectual disability, X-linked, syndromic 9 · mental retardation, X-linked, syndromic 9
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
Research-stage checklist from open sources (GenCC, literature, Monarch when enriched, ClinicalTrials.gov). Not a prognosis or care recommendation.
- Gene identifiedNot found
No GenCC disease–gene assertion in this build
- LiteraturePresent
2 matched papers (0 in last 10 years) Source
- Phenotype characterisedPresent
6 HPO annotations (e.g. Severe intellectual disability; Microcephaly; High forehead) Source
- Animal modelNot found
No Alliance genotype “model of” associations via Monarch for these Mondo IDs
- Orphan designationNot found
No FDA or EMA orphan-drug designation matched this disease via UMLS or preferred name Source
- Interventional trialNot found
No matched interventional trial under our ClinicalTrials.gov rules
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)
6
Associated phenotypes · MONDO:0010409
- Severe intellectual disability
- Microcephaly
- High forehead
- Strabismus
- Short stature
Showing 5 of 6 — open Monarch for the full list.
Animal models (Monarch / Alliance)
None returned for this Mondo ID. Empty here is not proof that no model organism work exists under another name or gene.
Monarch fetch 2026-07-29
Therapies
Designations, candidates, and chemicals
FDA OOPD and EMA orphan designations, Open Targets clinical candidates, and CTD chemical associations via MyDisease.info. These never change the interventional-trial headline.
Orphan designation (FDA · EMA)
No designation matched this disease via UMLS or preferred name on the FDA OOPD mirror or EMA orphan register. Absence here is not proof that none exists under another wording.
Open Targets candidates
No drugs or clinical candidates returned for this Mondo ID on Open Targets.
CTD chemicals (MyDisease.info)
No CTD chemical associations returned for this Mondo ID.
Literature
Is anyone studying this?
2
2 papers have ever been indexed under this name. For scale, breast cancer has over 700,000. Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=3967) is 59.
2 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 59 (publications denominator n=3967).
0 in the last 10 years · high confidence · 2.3th percentile (publications denominator)
Phrase hits: 2 · MeSH hits: 0
Who's working on it?
4
Distinct author names in 2 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.
- 01Hoo JJ2 papers · 2000Papers in Europe PMC
- 02Shrimpton AE2 papers · 2000
Department of Clinical Pathology, State University of New York, Health Science Center, Syracuse, USA. Shrimpta@mailbox.hscsyr.edu
Papers in Europe PMC - 03Braddock BR1 paper · 2000Papers in Europe PMC
- 04Daly KM1 paper · 1999Papers 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).
Data as of 11 September 2026 · last trial check 11 September 2026
No matched interventional trials. This is true for 77.2% of diseases in the trials denominator (5501 of 7126). Here are the researchers publishing on it.
high confidence · 38.6th 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.
See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.
Other registries (secondary)
Broader net from EU CTIS, ISRCTN, and ICTRP when available — deduped against ClinicalTrials.gov IDs already counted above. Dual-model LLM relevance gates what we keep. These rows are not added to the interventional headline.
raw 25 · after dedupe 25 · already on CT.gov 0 · kept 0 · parent 0 · uncertain 25 · dropped 0 · fetched 2026-07-30
Source notes: ictrp: Error: ICTRP public search unavailable (WHO portal is SPA-only; SOAP needs partnership). Tried: https://apps.who.int/tri
No secondary-registry studies passed dual-model relevance for this condition name (after dedupe).
Uncertain / not reviewed (25)
- ctis·2025-524635-39-00·Authorised·An Open Label, Single Arm, Phase I/II Clinical Study of Autologous CD4+ T-Cells Edited Ex-Vivo at the CD40LG Locus by CRISPR/Cas9 and IDLV-based vector in Patients with X-linked Hyper IgM Syndrome Type 1 (HIGM1)
skipped — LLM skipped (--skip-llm)
- ctis·2025-523275-27-00·Authorised, recruiting·HELIOS: An Open-Label, Long-Term Study to Investigate the Safety, Tolerability, and Efficacy of DISC-1459 (Bitopertin) in Participants with Erythropoietic Protoporphyria (EPP) or X-Linked Protoporphyria (XLP).
skipped — LLM skipped (--skip-llm)
- ctis·2025-523213-29-00·Authorised·A Phase 1/2, Multicenter, Open-label, Dose Escalation and Expansion Clinical Study to Evaluate the Safety, Tolerability and Preliminary Efficacy of ASP2957 in Male Participants with Invasive Ventilator-dependent X-linked Myotubular Myopathy
skipped — LLM skipped (--skip-llm)
- ctis·2024-519833-51-00·Authorised·The efficacy of pipamperone and aripiprazole on behaviors that challenge in people with intellectual disabilities: A series of N-of-1 cross-over trials
skipped — LLM skipped (--skip-llm)
- ctis·2024-519779-24-00·Authorised, ongoing·GFM-VEXAS-MMB: A single-arm phase II with safety run-in multicenter study of momelotinib in patients with VEXAS syndrome with or without associated myelodysplastic syndrome
skipped — LLM skipped (--skip-llm)
- ctis·2024-520407-27-00·Expired·APOLLO: A Randomized, Double-Blind, Placebo-Controlled Study of Bitopertin to Evaluate the Efficacy, Safety, and Tolerability in Participants with
Erythropoietic Protoporphyria (EPP) or X-Linked Protoporphyria (XLP)
skipped — LLM skipped (--skip-llm)
- ctis·2024-516347-41-00·Authorised, ongoing·PAXIS: A randomized, double-blind, placebo-controlled dose-finding phase 2 study (Part 1) followed by an open-label period (Part 2) to assess the efficacy and safety of pacritinib in patients with VEXAS syndrome
skipped — LLM skipped (--skip-llm)
- ctis·2024-512700-18-00·Expired·Long-Term Follow-up of Fabry Disease Subjects who were Treated with ST-920, an AAV2/6 Human Alpha Galactosidase A Gene Therapy
skipped — LLM skipped (--skip-llm)
- ctis·2024-518989-27-01·Cancelled·Treating Leg Symptoms in Women with X-linked Adrenoleukodystrophy: A Key to Improving Sleep and Gait Performance
skipped — LLM skipped (--skip-llm)
- ctis·2023-509390-23-00·Authorised, ongoing·A Multicenter, Open-label, Phase 1/2, Dose-escalation and Subsequent Safety Extension Study of Subcutaneous KK8123 in Adult Patients with X-linked Hypophosphatemia
skipped — LLM skipped (--skip-llm)
- ctis·2023-507994-16-00·Cancelled·A Long-term Follow-up Study to Evaluate the Safety and Efficacy of Retinal Gene Therapy in Subjects with Choroideremia Previously Treated with Adeno-Associated Viral Vector Encoding Rab Escort Protein-1 (AAV2-REP1) and in Subjects with X-Linked Retinitis Pigmentosa Previously Treated with Adeno-Associated Viral Vector Encoding RPGR (AAV8-RPGR) in an Antecedent Study (SOLSTICE)
skipped — LLM skipped (--skip-llm)
- ctis·2024-513436-14-00·Authorised, ongoing·Evaluation of oxytocin treatment in children with autism and intellectual disability’, Multiple-dose Oxytocine - ASD and Intellectual Disability
skipped — LLM skipped (--skip-llm)
- ctis·2024-511181-36-00·11·A Randomized, Controlled, Masked, Multi-center Study Evaluating the Efficacy, Safety, and Tolerability of Two Doses of AGTC-501 Compared to an Untreated Control Group in Male Participants with X-linked Retinitis Pigmentosa
skipped — LLM skipped (--skip-llm)
- ctis·2024-516306-28-00·Revoked·Interest of Oxytocin as an Adjuvant Treatment of Psycho-educational Measures in Challenging Behaviors in Children With Autism Spectrum Disorders and Moderate to Severe Intellectual Disability: Feasibility and Safety Study. (OT-DEFI)
skipped — LLM skipped (--skip-llm)
- ctis·2024-514466-38-00·Expired·A Phase 3, Multicenter, Open-label, Long-term, Extension Study to Evaluate Safety and Tolerability of Oral Dersimelagon (MT-7117) in Subjects with Erythropoietic Protoporphyria (EPP) or X-Linked Protoporphyria (XLP)
skipped — LLM skipped (--skip-llm)
- ctis·2024-512695-34-00·Cancelled·A Phase I/II, Multicenter, Open-Label, Single-Dose, Dose-Ranging Study to Assess the Safety and Tolerability of ST-920, an AAV2/6 Human Alpha Galactosidase A Gene Therapy in Subjects with Fabry Disease.
skipped — LLM skipped (--skip-llm)
- ctis·2024-513124-41-00·Cancelled·Influencing Progression of Airway Disease in Primary Antibody Deficiency
skipped — LLM skipped (--skip-llm)
- ctis·2024-512790-27-00·Cancelled·A phase I/II, non randomized, monocentric open-label study of autologous CD34+ cells transduced with the G1XCGD lentiviral vector in patients with X-linked chronic granulomatous disease
skipped — LLM skipped (--skip-llm)
- ctis·2024-511411-25-00·Expired·Phase 3 Follow-up Study of AAV5-hRKp.RPGR for the Treatment of X-linked Retinitis Pigmentosa Associated with Variants in the RPGR gene
skipped — LLM skipped (--skip-llm)
- ctis·2024-513774-21-00·Expired·AN OPEN-LABEL, MULTICENTER STUDY IN MALE PEDIATRIC PATIENTS WITH CEREBRAL X-LINKED ADRENOLEUKODYSTROPHY (CALD) TO ASSESS THE EFFECTS OF MIN-102 TREATMENT ON DISEASE PROGRESSION PRIOR TO HUMAN STEM CELL TRANSPLANT (HSCT)
skipped — LLM skipped (--skip-llm)
- ctis·2024-512632-30-00·Authorised, ongoing·A prospective, open-label, genotype-match controlled, multicenter clinical trial to investigate the efficacy and safety of intra-amniotic ER004 as a prenatal treatment for male subjects with X-linked hypohidrotic ectodermal dysplasia (XLHED)
skipped — LLM skipped (--skip-llm)
- ctis·2023-504419-34-00·Expired·A three-period multicenter study, with a randomized-withdrawal, double-blinded, placebo-controlled design to evaluate the clinical efficacy, safety and tolerability of MAS825 in patients with monogenic IL-18 driven autoinflammatory diseases, including NLRC4-GOF, XIAP deficiency, or CDC42 mutations.
skipped — LLM skipped (--skip-llm)
- ctis·2024-512637-32-00·Expired·ASPIRO: A Phase 1/2/3, Randomized, Open-Label, Ascending-Dose, Delayed-Treatment Concurrent Control Clinical Study to Evaluate the Safety and Efficacy of AT132, an AAV8-Delivered Gene Therapy in X-Linked Myotubular Myopathy (XLMTM) Patients
skipped — LLM skipped (--skip-llm)
- ctis·2023-506735-15-00·Cancelled·MT-7117-A-302 Study: A Phase 3, Multicenter, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate Efficacy, Safety, and Tolerability of MT-7117 in Adults and Adolescents with Erythropoietic Protoporphyria or X-Linked Protoporphyria
skipped — LLM skipped (--skip-llm)
- ctis·2023-504534-21-00·Cancelled·Open-label extension study with Tadekinig alfa (r-hIL-18BP) to monitor safety and tolerability in patients with IL-18 driven monogenic autoinflammatory conditions: NLRC4 mutation and XIAP deficiency
skipped — LLM skipped (--skip-llm)
Where to find support
Condition-specific patient organisations, when Orphanet lists them, are on the disease’s Orphanet page. We also link umbrella groups that support undiagnosed and ultra-rare families.
Orphanet entry for X-linked intellectual disability, Shrimpton type — check Associations / patient organisations on that page.
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 intellectual disability, Shrimpton type" OR "MRXS9" OR "intellectual disability, X-linked, syndromic 9" OR "mental retardation, X-linked, syndromic 9"
MeSH descriptor terms unioned into the query: Mental Retardation, X-Linked, Syndromic 9
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"X-linked intellectual disability, Shrimpton type" OR "MRXS9" OR "intellectual disability, X-linked, syndromic 9" OR "mental retardation, X-linked, syndromic 9"
Study-type breakdown: 0 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.
Query health: suspect — strategies attempted: phrase, mesh; 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
Ingested 2026-07-27T02:55:01.832Z