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Atrophoderma and juvenile idiopathic arthritis.

Juvenile idiopathic arthritis (JIA) is a heterogeneous group of arthritis occurring in children under the age of 16. It is a complex multifactorial disease with genetic, immunological, and environmental factors strongly associated with causation.1 2 The incidence of JIA in the UK varies from 10 to 20/100 000/year, with a prevalence of 1/1000.3 

Idiopathic atrophoderma, as described by Pasini and Pierini, is a distinctive form of dermal atrophy seen particularly in children and younger people.4 There are usually no clinical signs of inflammation or symptoms. We report on a 13 year old girl with JIA and atrophoderma. Although considered a variant of morphea, atrophoderma is thought to be a distinct nosological entity. We believe that this is the first time an association between the two has been described.

### CASE REPORT

A 13 year old girl was referred by …