ORPHA:435998
Autosomal recessive intermediate Charcot-Marie-Tooth disease type D
Also known as: RI-CMT type D
Publications
1,055
Trials
0
Interventional, condition-specific
Researchers
69
Distinct authors in sample
Gene link
COX6A1
Strong
Readiness
4/6
Stages with a signal
Clinical definition (Orphanet)
intermediate Charcot-Marie-Tooth disease type D is a rare motor and sensory characterized by childhood onset of unsteady gait, pes cavus, frequent falls and foot dorsiflexor weakness slowly progressing to distal upper and lower limb muscle weakness and atrophy, distal sensory impairment and reduced tendon reflexes. Additional symptoms may include bilateral sensorineural hearing impairment and neuropathic pain.
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:0014467
- OMIM:616039
- UMLS:C5569027
Additional Mondo synonyms (6)
CMTRID · COX6A1 Charcot-Marie-Tooth disease · Charcot-Marie-Tooth disease caused by mutation in COX6A1 · Charcot-Marie-Tooth disease recessive intermediate type D · Charcot-Marie-Tooth disease, recessive Intermediate type D · autosomal recessive intermediate Charcot-Marie-Tooth disease type D
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
No matched interventional trial, but a gene association and an animal model are on record — often described as translation-ready / stalled at the clinical step.
- Gene identifiedPresent
Strong — COX6A1
- LiteraturePresent
1,055 matched papers (801 in last 10 years) Source
- Phenotype characterisedPresent
8 HPO annotations (e.g. Hyporeflexia; Pes cavus; Peripheral neuropathy) Source
- Animal modelPresent
1 genotype model (Mus musculus) Source
- 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?
Yes — we know a specific gene responsible (COX6A1).
GenCC classification: Strong.
Phenotypes (Monarch / HPO)
8
Associated phenotypes · MONDO:0014467
- Hyporeflexia
- Pes cavus
- Peripheral neuropathy
- Steppage gait
- Areflexia
Showing 5 of 8 — open Monarch for the full list.
Animal models (Monarch / Alliance)
1
Model associations linked to this Mondo ID
- Cox6a1tm1(KOMP)Wtsi/Cox6a1tm1(KOMP)Wtsi [background:] involves: C57BL/6JJcl * C57BL/6N·MGI:5804696·Mus musculus
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?
1,055
1,055 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.
1,055 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).
801 in the last 10 years · low confidence
Phrase hits: 8 · MeSH hits: 0
Who's working on it?
69
Distinct author names in 8 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.
- 01Ando M1 paper · 2022
Department of Neurology and Geriatrics, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima City, Kagoshima, 890-8520, Japan.
Papers in Europe PMC - 02Barsottini OG1 paper · 2016
3 Department of Neurology, Universidade Federal de São Paulo, Brazil.
Papers in Europe PMC - 03Battaloğlu E1 paper · 2022
Department of Molecular Biology and Genetics, Boğaziçi University, İstanbul, Turkey.
Papers in Europe PMC - 04Brophy PJ1 paper · 2020
Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom.
Papers in Europe PMC - 05Caltagirone C1 paper · 2016
2 Dipartimento di Medicina dei Sistemi, Università di Roma "Tor Vergata", Rome, Italy 4 Laboratorio di Neurologia Clinica e Comportamentale, IRCCS Santa Lucia, Rome, Italy.
Papers in Europe PMC - 06Candayan A1 paper · 2022
Department of Molecular Biology and Genetics, Boğaziçi University, İstanbul, Turkey.
Papers in Europe PMC - 07Casella A1 paper · 2016
1 Laboratorio di Neurogenetica, CERC - IRCCS Santa Lucia, Rome, Italy.
Papers in Europe PMC - 08Cuevas-Covarrubias SA1 paper · 2022
Hospital General de Mexico, National Autonomous University of Mexico, Mexico City, Mexico.
Papers in Europe PMC - 09Doccini S1 paper · 2021
IRCCS Fondazione Stella Maris, Calambrone, 56128 Pisa, Italy.
Papers in Europe PMC - 10Eichel MA1 paper · 2020
Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany.
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 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.
low 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.
Broader category autosomal recessive intermediate Charcot-Marie-Tooth disease also has no matched interventional trial. See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.
Broader category: autosomal recessive intermediate Charcot-Marie-Tooth disease
0
Interventional trials for the parent category, exclusive of NCT IDs already counted above. Eligibility for this subtype is not guaranteed.
Parent-category matching found a broader label but no interventional trials under it. How we count trials.
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 0 · after dedupe 0 · already on CT.gov 0 · kept 0 · parent 0 · uncertain 0 · 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).
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 Autosomal recessive intermediate Charcot-Marie-Tooth disease type D — 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.
("Autosomal recessive intermediate Charcot-Marie-Tooth disease type D" OR "RI-CMT type D" OR "CMTRID" OR "COX6A1 Charcot-Marie-Tooth disease" OR "Charcot-Marie-Tooth disease recessive intermediate type D" OR "Charcot-Marie-Tooth disease, recessive Intermediate type D") OR ("COX6A1" OR "COX6A1 syndrome" OR "COX6A1-related")ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"Autosomal recessive intermediate Charcot-Marie-Tooth disease type D" OR "RI-CMT type D" OR "CMTRID" OR "COX6A1 Charcot-Marie-Tooth disease" OR "Charcot-Marie-Tooth disease recessive intermediate type D" OR "Charcot-Marie-Tooth disease, recessive Intermediate type D"
Study-type breakdown: 0 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.
Parent-category trials query:
"autosomal recessive intermediate Charcot-Marie-Tooth disease"
Query health: ok — strategies attempted: phrase; with hits: phrase
Run this search on ClinicalTrials.gov
Synonyms dropped by stoplist: Charcot-Marie-Tooth disease caused by mutation in COX6A1
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 (1055) is implausibly high for prevalence class "<1 / 1 000 000" — treat as possible over-matching, not a measure of research intensity
Ingested 2026-07-27T16:06:38.628Z