A 3-year-old child presented to the OPD with chief complaints of high-grade fever for 15 days along with a polymorphous exanthem all over the body, rhinorrhea, multiple episodes of vomiting, diarrhea and abdominal pain. O/E: – B/L conjunctival injection with limbal sparing Erythema of oral and pharyngeal mucosa Edema of hands and feet* Mild cervical lymphadenopathy at III and IV levels Lab findings: – Leucocytosis with neutrophilia and immature forms Elevated erythrocyte sedimentation rate* Elevated c-reactive protein Anemia Abnormal plasma lipids Hypoalbuminemia Hyponatremia. Coronary angiogram What should be the most impoant next step in the management of the child: –

**Core Concept**
The child's presentation is suggestive of Kawasaki disease, an acute febrile illness of childhood characterized by vasculitis of the coronary arteries, mucocutaneous lymph node syndrome, and a distinctive clinical and laboratory profile.

**Why the Correct Answer is Right**
Kawasaki disease is a medical emergency requiring prompt recognition and treatment to prevent coronary artery aneurysms. The clinical findings of prolonged fever, polymorphous exanthem, conjunctival injection with limbal sparing, erythema of oral and pharyngeal mucosa, cervical lymphadenopathy, and laboratory abnormalities such as leucocytosis, elevated erythrocyte sedimentation rate, and abnormal plasma lipids are consistent with Kawasaki disease. The coronary angiogram is essential in diagnosing and assessing the coronary arteries for aneurysms.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not address the immediate need for coronary artery evaluation in Kawasaki disease. While it may be part of the diagnostic workup, it is not the most important next step.

**Option B:** This option is incorrect as it does not address the urgent need for treatment to prevent coronary artery aneurysms. High-dose aspirin and IV immunoglobulin are the mainstays of treatment for Kawasaki disease.

**Option C:** This option is incorrect as it is a diagnostic test that may be part of the workup but is not the most important next step in management. A comprehensive laboratory evaluation is essential, but it does not supersede the need for coronary artery evaluation.

**Option D:** This option is incorrect as it is not a specific treatment for Kawasaki disease. While supportive care is important, it does not address the urgent need for treatment to prevent coronary artery aneurysms.

**Clinical Pearl / High-Yield Fact**
Kawasaki disease is a medical emergency, and prompt recognition and treatment are crucial to prevent coronary artery aneurysms. The absence of fever for 48 hours after starting treatment is a good prognostic sign, and the presence of coronary artery aneurysms is a poor prognostic sign.

**Correct Answer:** D. High-dose aspirin and IV immunoglobulin are the mainstays of treatment for Kawasaki disease.

✓ Correct Answer: C. Sta on both IVIg and aspirin