Diagnosis: Kawasaki disease
A 4-year-old male presents with a five-day history of fever, accompanied by a distinctive strawberry tongue and cracked red lips. The patient exhibits additional signs including conjunctival injection and cervical lymphadenopathy, prompting further evaluation for a potential systemic inflammatory condition.
A 4-year-old male presents to the emergency department with a five-day history of high-grade fever, reaching 39.5°C (103°F). On examination, he displays a strawberry tongue, cracked red lips, and conjunctival injection. Notably, there is palpable cervical lymphadenopathy and a diffuse rash on the trunk and extremities.Fever: Persistent high-grade fever for over five days.Oral findings: Prominent strawberry tongue and cracked red lips.Conjunctival injection: Bilateral and non-purulent.Lymphadenopathy: Cervical lymph nodes >1.5 cm in diameter.Rash: Polymorphous rash involving the trunk and extremities.
The patient’s fever began abruptly and was unresponsive to antipyretics. There are no known triggers or preceding illnesses reported. His past medical history is unremarkable, with no history of recurrent infections or chronic conditions. Family history is notable for no autoimmune diseases, and there are no recent travel or exposure to sick contacts.Onset: Fever started suddenly, lasting more than five days.Response to treatment: Fever unresponsive to acetaminophen and ibuprofen.Past medical history: No significant prior illnesses or hospitalizations.Family history: No history of autoimmune or inflammatory diseases.Social history: Attends preschool, no recent travel history.
Acute / First-Line ManagementIntravenous immunoglobulin (IVIg): Administer 2 g/kg as a single infusion to reduce the risk of coronary artery aneurysms.Aspirin: Start at high doses (80-100 mg/kg/day) for the first 14 days, then transition to low-dose (3-5 mg/kg/day) for antiplatelet therapy.Workup and Diagnostic ConfirmationLaboratory tests: Complete blood count, liver function tests, and inflammatory markers (ESR, CRP) to support the diagnosis.Echocardiogram: Perform to assess for coronary artery involvement.Urinalysis: Check for sterile pyuria and proteinuria.Long-Term ManagementCardiology follow-up: Regular monitoring with echocardiograms to evaluate coronary artery status.Long-term aspirin therapy: Continue low-dose aspirin for 6-8 weeks or longer based on coronary artery status.Vaccinations: Consider influenza and pneumococcal vaccines, especially if high-dose aspirin is continued.
Scarlet fever: Characterized by a sandpaper-like rash and pharyngitis; typically associated with Group A Streptococcus.Staphylococcal scalded skin syndrome (SSSS): Presents with widespread skin exfoliation and fever; usually in younger children.Systemic juvenile idiopathic arthritis: May present with fever and rash, but often with joint symptoms and prolonged duration.Viral exanthems: Common in children; typically associated with respiratory symptoms and resolves within a week.Infectious mononucleosis: Caused by Epstein-Barr virus; presents with fever, lymphadenopathy, and pharyngitis, but less commonly causes rash.Drug reaction: Can mimic Kawasaki with fever and rash; important to evaluate new medications.Still's disease: A form of systemic juvenile idiopathic arthritis with fever and rash, but typically associated with arthritis.Acute rheumatic fever: Can present similarly but usually follows a streptococcal infection and includes carditis.
High-Yield PearlsFever duration: Persistent fever lasting 5 days is a hallmark feature of Kawasaki disease.Oral findings: Strawberry tongue and cracked lips are characteristic and should raise suspicion.Coronary artery involvement: Early diagnosis and treatment are crucial to prevent cardiovascular complications.Aspirin therapy: High-dose aspirin is essential initially, followed by low-dose for long-term management.IVIg administration: Administer 2 g/kg IVIg to mitigate the risk of coronary artery aneurysms.Early recognition and treatment of Kawasaki disease are vital to prevent long-term cardiovascular sequelae.
Tags: Kawasaki disease, pediatric