Child health · UKMLA & AKT

Psoriatic juvenile idiopathic arthritis

A free high-yield preview for the UKMLA Applied Knowledge Test. Below are the key points to recognise psoriatic juvenile idiopathic arthritis — the full SA Note notes add investigations, management, complications and 10 practice questions.

Key high-yield points

  • One of seven ILAR JIA subtypes - accounts for ~5-8% of all JIA cases
  • Defined by arthritis + psoriasis, OR arthritis + characteristic extra-articular features when psoriasis is absent
  • Bimodal age distribution: early peak 2-3 years (girls, oligoarticular); later peak mid-childhood to adolescence (equal sex, polyarticular)
  • Joint disease commonly precedes psoriasis by months to years - do not exclude diagnosis on absence of skin plaques alone

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