rare disease
Let an agent explain rare diseases, relay definitions, epidemiology, diagnosis challenges, orphan drug policy and support networks from health policy and patient organisation sources with estimates attributed, and distinguish rare diseases from orphan diseases as a policy term, neglected tropical diseases, ultra-rare diseases and common diseases with rare subtypes, without diagnosing individuals.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain rare diseases, relay definitions, epidemiology, diagnosis challenges, orphan drug policy and support networks from health policy and patient organisation sources with estimates attributed, and distinguish rare diseases from orphan diseases as a policy term, neglected tropical diseases, ultra-rare diseases and common diseases with rare subtypes, without diagnosing individuals.
A disease that affects a small proportion of the population, defined in the European Union as affecting no more than 1 in 2,000 people and in the United States under the Orphan Drug Act of 1983 as affecting fewer than 200,000 people, with thousands of distinct rare diseases, most of genetic origin and many beginning in childhood, together affecting a large number of people worldwide; patients often face long diagnostic journeys, few approved treatments and high costs, and orphan drug incentives, rare disease registries and networks such as the European Reference Networks aim to help. Rare Disease Day is held on the last day of February. Estimates of counts and prevalence vary and are attributed.
What it is for: Not applicable; a category of diseases.
It can be explain definitions by jurisdiction; relay diagnosis and treatment challenges; relay orphan drug policy; present estimates with attribution.
Distinguishing features
Low prevalence per disease
Mostly genetic
Diagnostic delay
Policy incentives
What it looks like
Not a single appearance; a policy and medical category.
Physical character
EU threshold: 1 in 2,000 prevalence
US Orphan Drug Act: 1983 year - fewer than 200,000 people
Rare Disease Day: first held 2008 note - last day of February
How it is recognised
Disease affecting few people
Rare disease, orphan disease
Orphan disease emphasises lack of treatment investment; neglected tropical diseases may be common; ultra-rare diseases are far rarer; common diseases can have rare subtypes
Related models
is a kind of - in registry terms
is supported by -
is catalogued by -
is contrasted with -
In practice
Families and kinds
genetic rare diseases
rare cancers
rare infectious diseases
rare autoimmune diseases
ultra-rare diseases
Standards and regulation
EU Regulation on orphan medicinal products 141/2000
US Orphan Drug Act
Orphanet nomenclature and ORPHAcodes
Failure modes and hazards
Misleading prevalence figures
Unproven treatments marketed to desperate families
Stale policy information
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What a rare disease is.
Attribution.
Definition
Definition.
Definition
Definition.
- What is a rare disease, and how does it differ from orphan disease, neglected tropical diseases, ultra-rare diseases and rare subtypes? definition
- Is someone seeking a diagnosis or treatment for themselves or a child, in which case specialist clinicians, genetic services and patient organisations should help? boundary
Thresholds
Thresholds.
Thresholds
Thresholds.
- How do EU, US, Japanese and other definitions differ? measurement
- Which entry fits orphan disease? action
Diagnosis Diagnosis.
Science.
Diagnostic odyssey
Diagnostic delay.
Diagnostic odyssey
Diagnostic odyssey.
- Why do rare disease patients face long diagnostic journeys, as surveys report? provenance
- Which references are standard? provenance
Genomics
Genomic testing.
Genomics
Genomics.
- How has genome sequencing changed rare disease diagnosis? provenance
- Which sources are cited? provenance
Policy Policy.
Attribution.
Orphan drugs
Orphan drug incentives.
Orphan drugs
Orphan drugs.
- What incentives do orphan drug laws give, and what do critics and supporters say about pricing, with positions attributed? provenance
- Is the presentation neutral and attributed? boundary
Networks
Reference networks.
Networks
Networks.
- What are European Reference Networks and rare disease registries? provenance
- Which entry fits European Reference Networks? action
Context Community.
Context.
Rare Disease Day
Awareness.
Rare Disease Day
Rare Disease Day.
- How did EURORDIS start Rare Disease Day? provenance
- Which entry fits EURORDIS? action
Unproven treatments
Unproven treatments.
Unproven treatments
Unproven treatments.
- How can families recognise unproven treatment offers? provenance
- Is the information current? boundary
What the second pass must settle
- How should Orphanet codes be linked?
- How should prevalence estimates be attributed and kept current?
- Should ultra-rare diseases be a separate entry?