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ORPHA:1929

Rasmussen syndrome

low confidenceDisorder

Also known as: Rasmussen subacute encephalitis

Publications

2,195

Trials

4

Interventional, condition-specific

Researchers

1,178

Distinct authors in sample

Gene link

—

Readiness

4/6

Stages with a signal

Clinical definition (Orphanet)

A rare inflammatory and autoimmune disease with characterized by unilateral hemispheric atrophy, associated with drug-resistant focal , hemiplegia, and cognitive decline. The disease mainly affects children and begins with a prodromal period with mild hemiparesis or infrequent lasting up to several years. The acute stage is marked by frequent arising from one cerebral hemisphere, followed by a residual stage with persistent severe neurological deficits and relapsing .

How rare: How common this is has not been clearly measured.

Orphanet entry

Cross-references

Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.

Additional Mondo synonyms (6)

CFE · Rasmussen Encephalitis · Rasmussen encephalitis · Rasmussen’s encephalitis · Rasmussen’s syndrome · chronic focal encephalitis

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.”

4/6 stages with a signal

An interventional trial matched this condition name on ClinicalTrials.gov — see trials below.

  1. Gene identifiedNot found

    No GenCC disease–gene assertion in this build

  2. LiteraturePresent

    2,195 matched papers (1,138 in last 10 years) Source

  3. Phenotype characterisedPresent

    48 HPO annotations (e.g. Hemiparesis; Ventriculomegaly; Subcortical cerebral atrophy) Source

  4. Animal modelNot found

    No Alliance genotype “model of” associations via Monarch for these Mondo IDs

  5. Orphan designationPresent

    1 FDA designation (1 FDA orphan-indication approval) — e.g. rituximab Source

  6. Interventional trialPresent

    4 matched on ClinicalTrials.gov

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)

48

Associated phenotypes · MONDO:0016019

  • Hemiparesis
  • Ventriculomegaly
  • Subcortical cerebral atrophy
  • Epilepsia partialis continua
  • Repeated focal motor seizures

Showing 5 of 48 — 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)

1

Designation · 1 with FDA orphan-indication approval

  • FDA rituximabRasmussen Encephalitis · 2016-11-09 · Not FDA Approved for Orphan Indication

Sources: FDA OOPD · EMA orphan designations

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?

2,195

2,195 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=3967) is 59.

2,195 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).

1,138 in the last 10 years · low confidence

Phrase hits: 2,195 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

1,178

Distinct author names in 200 sampled papers — named people below.

Who's working on it?

People publishing on this condition (sampled Europe PMC records). Affiliation is the most recent found in that sample.

  1. 01
    Luan G10 papers · 2026

    Department of Neurosurgery, SanBo Brain Hospital, Capital Medical University, Beijing, China.

    Papers in Europe PMC
  2. 02
    Tang C8 papers · 2026

    Department of Neurosurgery, SanBo Brain Hospital, Capital Medical University, Beijing, China.

    Papers in Europe PMC
  3. 03
    Bien CG6 papers · 2025

    Department of Epileptology (Mara Hospital), Medical School, Bielefeld University, Bielefeld, Germany.

    Papers in Europe PMC
  4. 04
    Bulteau C6 papers · 2025

    2Department of Paediatric Neurosurgery, Hospital Fondation Adolphe de Rothschild, Paris, France; and.

    Papers in Europe PMC
  5. 05
    Ji T6 papers · 2026

    Department of Pediatrics, Peking University First Hospital, Beijing, China. Electronic address: jitaoyun@163.com.

    Papers in Europe PMC
  6. 06
    Li T6 papers · 2026

    Department of Neurology, SanBo Brain Hospital, Capital Medical University No. 50 Xiangshanyikesong Road, Haidian District, Beijing, 100093, China.

    Papers in Europe PMC
  7. 07
    Radbruch A6 papers · 2026

    Department of Neuroradiology, University Hospital Bonn, Bonn, Germany.

    Papers in Europe PMC
  8. 08
    Surges R6 papers · 2026

    Department of Epileptology, University Hospital Bonn, Bonn, Germany.

    Papers in Europe PMC
  9. 09
    Baciu M5 papers · 2025

    1University of Grenoble Alpes, CNRS, LPNC, Grenoble, France.

    Papers in Europe PMC
  10. 10
    Bauer T5 papers · 2026

    Department of Neuroradiology, University Hospital Bonn, Bonn, Germany.

    Papers in Europe PMC

Clinical research

Is a treatment being tested?

4

interventional trials for this specific condition

4 interventional trials matched this specific condition name; none in our sample are currently recruiting.

Data as of 11 September 2026

4 interventional trials — more than 77.2% of diseases in the trials denominator have none at all (5501 of 7126; this disease is at the 88.1th percentile).

low confidence · 88.1th percentile (trials denominator)

Recruiting interventional trials

From the matched ClinicalTrials.gov set

4 interventional trials matched after quoted-phrase search and title/condition post-filter.

No currently recruiting studies in the matched set. Open the same search on ClinicalTrials.gov.

Observational and natural-history studies

2 observational studies match 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

Open the complete matched search on ClinicalTrials.gov

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 1 · after dedupe 1 · already on CT.gov 0 · kept 0 · parent 0 · uncertain 1 · dropped 0 · fetched 2026-07-29

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 (1)

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 Rasmussen syndrome — check Associations / patient organisations on that page.

India — NPRD

Last verified 2026-07-26

This 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.

"Rasmussen syndrome" OR "Rasmussen subacute encephalitis" OR "Rasmussen Encephalitis" OR "Rasmussen’s encephalitis" OR "Rasmussen’s syndrome" OR "chronic focal encephalitis"

Run this search on Europe PMC

ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):

"Rasmussen syndrome" OR "Rasmussen subacute encephalitis" OR "Rasmussen Encephalitis" OR "Rasmussen’s encephalitis" OR "Rasmussen’s syndrome" OR "chronic focal encephalitis"

Interventional trials matched via: phrase (mesh = registered under a MeSH descriptor no name phrase would catch; recall-expansion = gene / selected parent terms used only for trials).

Study-type breakdown: 4 interventional · 2 observational · 0 expanded access. Only interventional studies enter the trial headline.

Query health: ok — strategies attempted: phrase; with hits: phrase

Run this search on ClinicalTrials.gov

Synonyms dropped by stoplist: CFE

Confidence reasoning

  • Preferred label is short or not clearly distinctive
  • 1 synonym(s) dropped by stoplist (may under-count)
  • No label/synonym collisions with other diseases in this corpus

Ingested 2026-07-26T18:32:04.989Z