rare ... see also overview of Lichen sclerosis.
Although definitive data are not available, lichen sclerosus is considered a rare disorder that can develop in people of all ages. (Source: excerpt from Questions and Answers About Lichen Sclerosis: NIAMS)
16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about the prevalence and/or incidence of Lichen sclerosis.
The cause of lichen planus is unknown. Eruptions similar to lichen planus have been induced by arsenic, bismuth, gold, quinidine, propranolol, and naproxen. Exposure to developers used in color photography may likewise cause an eruption that’s indistinguishable from lichen planus.
Lichen planus is found in all geographic areas, with equal distribution among races. Eruptions of lesions with features characteristic of lichen planus occur most often in middle-age people and are uncommon in young and elderly people.
Source: Professional Guide to Diseases (Eighth Edition), 2005
The term 'prevalence' of Lichen sclerosis usually refers to the estimated population of people who are managing Lichen sclerosis at any given time. The term 'incidence' of Lichen sclerosis refers to the annual diagnosis rate, or the number of new cases of Lichen sclerosis 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.
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