The following is an excerpt....
BASICS
Description
A benign skin condition characterized by grouped papules, which typically occur in an annular pattern. 4 variants have been described, the most common of which is localized granuloma annulare (GA). The other types are generalized (or disseminated), subcutaneous, and perforating.
Epidemiology
Incidence
GA is not common, though its occurrence in the general population is unknown. It is seen more often in women, with a ratio of 2:1 over men. The age distribution varies by type, as follows:
- Localized: Children and adults <30 years old
- Generalized: Bimodal: Children <10 and adults 30–60 years old
- Subcutaneous: Children 2–10 years old
- Perforating: Typically children, but also young adults
Prevalence
Among cases of GA, the approximate distribution is as follows:
- Localized: 75%
- Generalized: 10–15%
- Subcutaneous: <5%
- Perforating: <5% (perhaps higher in Hawaii)
Risk Factors ...
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