Fever with persistent flagellate erythema in a primigravida: a rare presentation of adult-onset Still's disease.

We describe a case of a 25-year-old primigravida, who presented to the emergency department with fever, arthralgia and erythematous maculopapular eruption. There was confluent violaceous macular erythema on the arms, v-area of the neck and upper back with periorbital oedema, mimicking dermatomyositis. There was flagellate erythema on the back. Skin biopsy and systemic investigations helped to rule out dermatomyositis. A final diagnosis of adult-onset Still's disease with atypical cutaneous manifestations was made. This atypical variant is associated with a worse prognosis. Early recognition of this clinical variant can be life-saving for the patient.