Explain juvenile dermatomyositis to a worried parent — OSCE

What the candidate must do

Acknowledge the mother's worry, confirm her understanding, and explain juvenile dermatomyositis in plain language as an inflammation of the skin and muscles caused by an overactive immune system. Explain that the rash around the eyes and over the knuckles and the leg weakness are two parts of the same illness, and that the blood test showing a raised muscle enzyme called creatine kinase confirms that the muscles are inflamed. Describe a magnetic resonance imaging scan as a safe way to see the inflammation without a biopsy in most cases. [1]

Outline the treatment honestly: strong anti-inflammatory medicine called corticosteroids, given first by a short drip in hospital and then as tablets, together with a weekly medicine called methotrexate that allows the steroids to be tapered more safely. Name the common side effects the family should expect and watch for — lowered immunity with infection risk, stomach protection, calcium and vitamin D for the bones, and the need for regular blood tests — and explain the multidisciplinary team of rheumatology, physiotherapy, occupational therapy, dermatology and psychology. [2]

Address the prognosis and the calcinosis risk without overpromising: most children improve substantially with modern treatment, but the illness is serious and lasts months to years, and the most important reason to treat aggressively now is to prevent hard calcium lumps under the skin called calcinosis that can be painful and hard to reverse once they form. Agree a clear follow-up plan, give written information and a contact for questions, and offer psychology support for the child and family. [1] [2] [3]

Examiner prompts

These prompts probe the candidate's plain-language framing of the diagnosis, the treatment rationale, the calcinosis risk and the prognosis. [1]

• "What exactly is juvenile dermatomyositis — is it a muscle disease or a skin disease?" [1]
• "Will the steroids harm her, and how long will she need them?" [2]
• "You mentioned calcinosis — what is it and can you prevent it?" [3]
• "Will she recover and lead a normal life?" [1]

Marking focus

The candidate establishes rapport, uses plain language without jargon, frames the disease accurately as a treatable immune-mediated inflammation of skin and muscle, explains the rationale for early aggressive treatment to prevent calcinosis, names the side effects honestly, and agrees a concrete follow-up and safety-netting plan with written information and contact details. [1]