A 3-year-old child is admitted to the pediatric unit with a 5-day history of high fever. The nurse is conducting an assessment for Kawasaki disease. Which finding would be MOST indicative of this condition?
1Petechial rash on the trunk and extremities
2Koplik spots on the buccal mucosa
3Bilateral conjunctivitis without purulent discharge✓ 정답
4Vesicular lesions on the palms and soles
해설
Bilateral nonpurulent conjunctivitis with limbal sparing is a classic and highly specific sign of Kawasaki disease, occurring in about 85% of cases. Other options are associated with different conditions like meningococcemia (petechial rash), measles (Koplik spots), or hand-foot-and-mouth disease (vesicular lesions).
Clinical Judgment
This question assesses the ability to identify the core clinical signs of Kawasaki disease. The key is to remember the specific 5 diagnostic criteria along with persistent fever for 5 days or more. Option 1 accurately describes three of these criteria (bilateral conjunctival injection without exudate, strawberry tongue, and polymorphous rash). This is the most typical symptom cluster that raises suspicion for Kawasaki disease. The other options present signs of different conditions (e.g., varicella, measles, meningococcemia), making Differential Diagnosis crucial.
Memory Tip:
A mnemonic to remember the 5 principal criteria of Kawasaki disease: Conjunctivitis, Oral changes, Rash, Extremity changes, Adenopathy. The initials spell COREA. It sounds just like "Korea," making it easy to remember.
KR vs US:
While the diagnostic criteria and treatment principles are the same, in Korea, the use of additional immunosuppressants (such as infliximab) may be considered more actively if fever persists or coronary artery abnormalities develop after intravenous immunoglobulin (IVIG) administration. Also, research on the rate of incomplete Kawasaki disease (cases not meeting all diagnostic criteria) in Korean children is active.
Clinical Pearl: Distinguishing Kawasaki Disease
In a young child with ≥5 days of fever, bilateral conjunctival injection without purulent discharge is a highly specific finding for Kawasaki disease (KD). The absence of exudate helps differentiate it from common bacterial or viral conjunctivitis. Early recognition is critical because prompt treatment with IVIG and high-dose aspirin within the first 10 days significantly reduces the risk of coronary artery aneurysms.
Key Diagnostic Criteria for KD (Requires Fever + 4 of 5)
Extremity Changes: Erythema and edema of hands/feet (acute phase) or periungual desquamation (subacute phase).
Polymorphous Rash: Diffuse maculopapular eruption, often accentuated in the perineal region.
Oropharyngeal Changes: Strawberry tongue, erythematous or fissured lips, or diffuse oropharyngeal erythema.
Cervical Lymphadenopathy: Usually unilateral, >1.5 cm in diameter.
Nursing Considerations & Pitfalls
Assessment: Do not dismiss irritability and prolonged fever as a simple viral illness. Inspect the conjunctiva closely for the absence of discharge.
Pitfall: Misdiagnosing the rash or mucosal findings as measles (Koplik spots) or hand-foot-and-mouth disease (vesicles) delays life-saving cardiac monitoring and treatment.
Action: If KD is suspected, ensure baseline echocardiography is ordered to assess for coronary artery dilation, and monitor for signs of myocarditis or pericarditis.
Kawasaki disease (KD) — An acute, self-limited systemic vasculitis primarily affecting children under 5, characterized by prolonged fever and mucosal inflammation, with risk of coronary artery aneurysms.
Bilateral conjunctivitis (non-exudative) — Inflammation of the conjunctiva in both eyes without pus or discharge, a principal diagnostic criterion for Kawasaki disease, typically bulbar and sparing the limbus.
Koplik spots — Small, white spots on the buccal mucosa opposite the molars, an early sign pathognomonic for measles (rubeola).
Petechial rash — Pinpoint, non-blanching red or purple spots caused by capillary bleeding, often associated with thrombocytopenia or vasculitis.
Coronary artery aneurysm — A potentially life-threatening complication of untreated Kawasaki disease involving abnormal dilation of the coronary arteries.