What is the likely diagnosis for an 8-year-old girl with fever for 6 days, injected lips and pharynx, bilateral conjunctivitis, and a rash that includes palms and soles?

The symptoms described align closely with Kawasaki disease, which is characterized by prolonged fever, conjunctivitis, injected lips and pharynx, and a characteristic rash that can involve the palms and soles. Kawasaki disease primarily occurs in children under five years old, but it can occasionally present in older children.

The prolonged fever lasting more than five days is a significant symptom for Kawasaki disease, as it typically persists for at least this duration. The conjunctivitis noted can be bilateral and non-purulent, differentiating it from other infections. The injected lips and pharynx are common physical findings in Kawasaki disease, often described as "strawberry tongue" or having erythematous changes. The presence of rash, particularly one that involves the palms and soles, further supports this diagnosis.

In contrast, other conditions have different presentations: Scarlet fever commonly presents with a scraping rash and is associated with streptococcal infection. Measles is characterized by a classic progression of symptoms including a distinct rash that does not commonly involve the palms and soles and typically includes Koplik spots in the mouth. Systemic lupus erythematosus is a systemic autoimmune condition that may present with fever and rash, but the combination of conjunctivitis and mucosal involvement is less