Prevalence and Incidence of Syringomyelia
Syringomyelia: Rare Disease
Syringomyelia is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Syringomyelia, or a subtype of Syringomyelia,
affects less than 200,000 people in the US population.
Ophanet, who are a consortium of European partners,
currently defines a condition rare when if affects 1 person per 2,000.
They list Syringomyelia as a "rare disease".
More information about Syringomyelia is available from Orphanet
About prevalence and incidence statistics:
The term 'prevalence' of Syringomyelia usually refers to the estimated population
of people who are managing Syringomyelia at any given time.
The term 'incidence' of Syringomyelia refers to the annual diagnosis rate,
or the number of new cases of Syringomyelia diagnosed each year.
Hence, these two statistics types can differ:
a short-lived disease like flu can have high annual incidence but low prevalence,
but a life-long disease like diabetes has a low annual incidence but high prevalence.
For more information see about prevalence and incidence statistics.