ORPHA:250994
1q21.1 microduplication syndrome
Also known as: Dup(1)(q21.1) · Trisomy 1q21.1
Query health: suspect — Only one of 2 strategies returned hits (phrase).
Publications
46
49.6th percentile
Trials
0
Interventional, condition-specific
Researchers
490
Distinct authors in sample
Gene link
—
Readiness
1/6
Stages with a signal
Clinical definition (Orphanet)
1q21.1 microduplication syndrome is a rare partial trisomy/tetrasomy with incomplete penetrance and variable expression characterized by macrocephaly, , , psychiatric disturbances (autism spectrum disorder, attention deficit hyperactivity disorder, schizophrenia, mood disorders) and mild facial dysmorphism (high forehead, hypertelorism). Other associated features include heart defects, , short stature, scoliosis.
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:0012915
- MeSH:C567290
- OMIM:612475
- UMLS:C2675891
Additional Mondo synonyms (5)
1q21.1 recurrent microduplication (possible susceptibility locus for neurodevelopmental disorders) · chromosome 1q21.1 duplication syndrome · chromosome 1q21.1 duplication syndrome, isolated cases · dup(1)(q21.1) · trisomy 1q21.1
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.”
1/6 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
46 matched papers (40 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 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)
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?
46
46 papers have ever been published on this condition (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=5449) is 41.
46 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).
40 in the last 10 years · high confidence · 49.6th percentile (publications denominator)
Phrase hits: 46 · MeSH hits: 0
Who's working on it?
490
Distinct author names in 46 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.
- 01Li H3 papers · 2025
BGI-Anhui Clinical Laboratory, BGI-Shenzhen, 236000, Fuyang, China.
Papers in Europe PMC - 02
- 03Liu Y3 papers · 2023
Department of Genetics, Jiangxi Maternal and Child Health Hospital, 330006, Nanchang, China.
Papers in Europe PMC - 04Wang C3 papers · 2023
Maternity and Child Health Hospital of Anhui Province, Hefei, China.
Papers in Europe PMC - 05Wang Y3 papers · 2024
Pediatric Research Institute, Qilu Children's Hospital of Shandong University, Ji'nan, 250022, China.
Papers in Europe PMC - 06Zhang H3 papers · 2023
Pediatric Research Institute, Qilu Children's Hospital of Shandong University, Ji'nan, 250022, China.
Papers in Europe PMC - 07Chen L2 papers · 2024
Department of Biological Sciences, Division of Natural Sciences and Mathematics, University of Denver, Denver, CO, USA.
Papers in Europe PMC - 08Hu T2 papers · 2021
Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, China.
Papers in Europe PMC - 09
- 10
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. 1 observational study did — shown below because natural-history and cohort work can be an important step toward a trial.
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.
high 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.
See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.
Observational and natural-history studies
1 observational study matches this condition. These do not test a treatment and are not counted in the interventional-trial headline, but they are genuine research: natural-history work often defines the endpoints needed for a future rare-disease trial, and families may be able to enroll.
Recruiting or not-yet-recruiting
- NCT01238250·RECRUITING·Online Study of People Who Have Genetic Changes and Features of Autism: Simons Searchlight
Conditions: 16P11.2 Deletion Syndrome · 16p11.2 Duplications · 1Q21.1 Deletion · 1Q21.1 Microduplication Syndrome (Disorder)·Matched via name phrase
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.
"1q21.1 microduplication syndrome" OR "Dup(1)(q21.1)" OR "Trisomy 1q21.1" OR "1q21.1 recurrent microduplication (possible susceptibility locus for neurodevelopmental disorders)" OR "chromosome 1q21.1 duplication syndrome" OR "chromosome 1q21.1 duplication syndrome, isolated cases"
MeSH descriptor terms unioned into the query: Chromosome 1q21.1 Duplication Syndrome
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"1q21.1 microduplication syndrome" OR "Dup(1)(q21.1)" OR "Trisomy 1q21.1" OR "1q21.1 recurrent microduplication (possible susceptibility locus for neurodevelopmental disorders)" OR "chromosome 1q21.1 duplication syndrome" OR "chromosome 1q21.1 duplication syndrome, isolated cases"
Study-type breakdown: 0 interventional · 1 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 2026-07-27T10:40:38.195Z