Rash, red eyes, lip erosions and genital ulcer - What is the diagnosis?

Maculopapular eruptions are frequently described as large areas of rash characterised by red, small, confluent bumps. They are frequently puzzling for the attending clinician due to the multiple possible aetiologies. Accurate diagnosis is important because treatment varies depending on the aetiology, and some rashes can be life-threatening if not treated promptly. Common aetiologies implicated include drug allergies, infection-related (for example: viral exanthems, scarlet fever) and autoimmune conditions (for example: Still's disease). We report a case of maculopapular eruption associated with mucocutaneous involvement and systemic symptoms. The possible differential diagnoses and approach to the management of this patient are discussed.