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π CustomizeMedical Overview of Harel-Yoon Syndrome
Sources citedA rare mitochondrial disease characterized by signs and symptoms within a phenotypic and metabolic spectrum that includes global developmental delay, hypotonia, intellectual disability, optic atrophy, axonal neuropathy, hypertrophic cardiomyopathy, lactic acidosis, and increased excretion of Krebs cycle intermediates. Other variable features are spasticity, seizures, ataxia, congenital cataract, and dysmorphic facial features. Age of onset is in the neonatal period or infancy.
Classification & codes: GARD 0017915 · Orphanet ORPHA:496790 · OMIM 617183 · ICD-10 E88.8
Sources: GARD (NIH/NCATS), Orphanet Β· last reviewed 2026. Educational only β not medical advice.
News & Updates
ALYFTREK shows positive Phase 3 results in children ages 2β5
Vertex plans global regulatory submissions for this pediatric age group in the first half of 2026.
Airway clearance routines that actually work for teens

3 open trials match this profile
Locations in NC, FL and GA.
Harel-Yoon Syndrome Family Conference
Illustrative example event Β· location TBD
Care & management overview — Harel-Yoon Syndrome
Educational programming; see the cited sources on this hub.
Harel-Yoon Syndrome News & Developments
The latest Harel-Yoon Syndrome research, news and registered trials — live from public sources. Each link opens the source directly; nothing here is auto-summarized or invented.
Recruiting trials
View all →Find a Harel-Yoon Syndrome Specialist Near You
Sample results β illustrative only. A real version would search the NPPES provider registry and CFF-certified centers by actual distance from your ZIP.
Treatment & Daily Living
Medical care plus the everyday therapies and supports relevant to Harel-Yoon Syndrome. Treatment is individualized — ask your specialist about the medications, procedures and therapies. Browse medications →
Media Center
News, podcasts, books & research for Harel-Yoon Syndrome — real coverage, links out, never re-hosted.
Audience Guides
Plain-language guidance for the people around someone with Harel-Yoon Syndrome — how to understand it and talk about it. AI-generated for communication, not medical advice; always confirm specifics with a clinician.
Companies Developing Treatments
Biopharma companies with registered trials for Harel-Yoon Syndrome — from ClinicalTrials.gov. Informational, not an endorsement, and not every program is in trials.
Preferences only β saved to your account, never shared or sold. No PHI. Sources: GARD (NIH/NCATS), Orphanet.
Tools
Every institution behind the faculty, with their affiliated experts.
Plain-language tools
For clinicians, nonprofits & industry partners.
Translates any dense medical text β papers, lab results, visit notes, jargon β into plain language.
Live on tomekohealth.com β not a demo mock-up.
Research Collaboration & Matching
Live on tomekohealth.com β not a demo mock-up.
Mental Health Toolkit
Sources citedCoping strategies, how to find a a specialist therapist, and mental-health resources built for the ups and downs of living with Harel-Yoon Syndrome β for patients and caregivers alike.
Preferences only β saved to your account, never shared or sold. No PHI. Sources: GARD (NIH/NCATS), Orphanet.
Grand Rounds & Accredited Education
Open Questions
Ask the community βAnyone can ask. Sign in to answer. Peer support — not medical advice, and no PHI.
Survey
Reflect on how you are doing β anonymous, with only de-identified group averages shown.
Community & Support Groups
For people living with Harel-Yoon Syndrome. Peer support, not medical advice; no PHI.
For caregivers and family navigating Harel-Yoon Syndrome.
Recent From the Community
Certified Centers of Excellence
CFF networkCare centers and specialists for Harel-Yoon Syndrome, from Tomeko’s verified provider directory (CMS NPPES).
Representative CFF centers β the official CFF directory has the complete, current list.
Nonprofits & Foundations
Grants & Financial Help
Representative programs β illustrative only. Eligibility and availability vary; not a guarantee of assistance.
Patient & Family Guides
Sources citedAn annual snapshot of Harel-Yoon Syndrome research, treatment access and outcomes, written in plain language for patients and families.
Practical starting points and things to plan for in the first year after diagnosis.
Step-by-step guidance, what to expect, and a sample daily routine.
Disclosure, accommodations, insurance transitions and workplace planning for teens and young adults with Harel-Yoon Syndrome.
Sources: GARD (NIH/NCATS), Orphanet Β· last reviewed 2026. Educational only β not medical advice.