A nurse is assessing a child with suspected Kawasaki disease. Which finding supports this diagnosis?

Choice A rationale Kawasaki disease (KD) is an acute systemic vasculitis often leading to an inflammatory state characterized by fever, conjunctivitis, and rash. The child is expected to be tachycardic and often hypertensive (due to inflammation and hyperdynamic state), or may be hypotensive in later shock, but bradycardia and hypotension are not typical diagnostic findings in the acute phase. Choice B rationale The presence of strawberry tongue (erythema and prominent papillae) and peeling (desquamation) of the palms and soles (especially in the subacute phase) are two of the key mucocutaneous findings that fulfill the American Heart Association's diagnostic criteria for Kawasaki disease. This systemic inflammatory response targets epithelial and vascular tissues. Choice C rationale Petechiae, small pinpoint hemorrhages, are often associated with conditions like meningococcemia, septicemia, or platelet disorders such as Idiopathic Thrombocytopenic Purpura (ITP). While a non-specific maculopapular rash or perineal desquamation can occur in Kawasaki disease (KD), petechiae are not considered a classic or defining diagnostic criterion. Choice D rationale Splinter hemorrhages are small lines of blood under the fingernails or toenails, classically associated with infective endocarditis (microemboli lodging in the nail bed capillaries). While Kawasaki disease can lead to carditis, splinter hemorrhages are not a specific assessment finding that supports the initial diagnosis of this particular systemic vasculitis.