ORPHA:98771
Spinocerebellar ataxia type 18
Also known as: SCA18
Publications
87
58.1th percentile
Trials
0
Interventional, condition-specific
Researchers
446
Distinct authors in sample
Gene link
—
Readiness
1/6
Stages with a signal
Clinical definition (Orphanet)
Spinocerebellar type 18 (SCA18) is a very rare subtype of type I cerebellar (ADCA type I). It is characterized by sensory and cerebellar .
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:0011834
- MeSH:C537197
- OMIM:607458
- UMLS:C1843884
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
87 matched papers (63 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?
87
87 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.
87 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).
63 in the last 10 years · high confidence · 58.1th percentile (publications denominator)
Phrase hits: 87 · MeSH hits: 0
Who's working on it?
446
Distinct author names in 87 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.
- 01Ashizawa T4 papers · 2018
Department of Neurology, Center for Movement Disorders and Neurorestoration College of Medicine, McKnight Brain Institute, University of Florida, 1149 South Newell Drive, L3-100, Gainesville, FL 32611, USA. Electronic address: tetsuo.ashizawa@neurology.ufl.edu.
Papers in Europe PMC - 02Fogel BL2 papers · 2013
Program in Neurogenetics, Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA. bfogel@ucla.edu
Papers in Europe PMC - 03Fujioka S2 papers · 2013
Department of Neurology at Mayo Clinic, 4500 San Pablo Road Cannaday Bldg 2-E, Jacksonville, FL 32224, USA.
Papers in Europe PMC - 04Hadjivassiliou M2 papers · 2017
Academic Department of Neurosciences, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK ; University of Sheffield, Royal Hallamshire Hospital, Royal Hallamshire Hospital, Glossop Rd, Sheffield, South Yorkshire S10 2JF UK.
Papers in Europe PMC - 05Hoggard N2 papers · 2017
Department of Neuroradiology, Sheffield Teaching Hospitals NHS Foundaiton Trust, Sheffield, UK.
Papers in Europe PMC - 06Kuo SH2 papers · 2022
Department of Neurology, Columbia University, New York, NY 10032, USA. emorymkpan@ntu.edu.tw sk3295@columbia.edu.
Papers in Europe PMC - 07Li H2 papers · 2022
National Cryosphere Desert Data Center, Lanzhou, 730000, China.
Papers in Europe PMC - 08Lu Y2 papers · 2025
Department of Neurology, Xuanwu Hospital, Capital Medical University Beijing, China.
Papers in Europe PMC - 09Pan MK2 papers · 2022
Department of Medical Research, National Taiwan University Hospital, Taipei City 10002, Taiwan. emorymkpan@ntu.edu.tw sk3295@columbia.edu.
Papers in Europe PMC - 10Paulson HL2 papers · 2018
Department of Neurology, University of Michigan Health Systems, Ann Arbor, MI 48109, USA. henryp@umich.edu
Papers 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. 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.
None of the matched observational studies is currently listed as recruiting.
General rare disease registries you may be eligible for
These studies enroll across many rare conditions. They are not counted as evidence that anyone is studying this specific disease.
- NCT01793168·RECRUITING·Rare Disease Patient Registry & Natural History Study - Coordination of Rare Diseases at Sanford
Conditions: Rare Disorders · Undiagnosed Disorders · Disorders of Unknown Prevalence · Cornelia De Lange Syndrome
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.
"Spinocerebellar ataxia type 18" OR "SCA18"
MeSH descriptor terms unioned into the query: Sensorimotor neuropathy with ataxia, autosomal dominant
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"Spinocerebellar ataxia type 18" OR "SCA18" OR "Sensorimotor neuropathy with ataxia, autosomal dominant" OR "autosomal dominant cerebellar ataxia type I" OR "autosomal dominant cerebellar ataxia"
Recall-expansion terms: autosomal dominant cerebellar ataxia type I, autosomal dominant cerebellar ataxia
Study-type breakdown: 0 interventional · 1 observational · 0 expanded access. Only interventional studies enter the trial headline.
Query health: ok — strategies attempted: phrase, mesh, recall-expansion; with hits: phrase, recall-expansion
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 2026-07-27T05:22:59.586Z