What symptom is NOT used in diagnosing Kawasaki disease?

Kawasaki disease is a rare pediatric condition characterized by inflammation of the blood vessels throughout the body, which can result in significant cardiovascular complications if not recognized and treated early. The disease is diagnosed based on a set of clinical criteria rather than a specific laboratory test.

In diagnosing Kawasaki disease, there are several key symptoms known as the "classic" features. These include persistent fever, peripheral edema, bilateral conjunctivitis, cervical lymphadenopathy, rash, and changes in the lips and oral cavity (such as strawberry tongue). Each of these symptoms plays a role in establishing the diagnosis.

Pneumonia, while a common respiratory illness in children, is not one of the diagnostic criteria for Kawasaki disease. The presence of pneumonia does not contribute to the diagnosis and is instead more indicative of other infectious processes. Thus, it stands out as a symptom that is not associated with Kawasaki disease. Recognizing the distinct symptoms outlined in the criteria is essential for clinicians to effectively identify and manage this condition.