3 years old boy with a history of fever from a week has diffuse faint rashes, erythema of palms and soles, enlarged unilateral cervical nodes and strawberry tongue. The diagnosis is __________
**Core Concept**
The patient's presentation is suggestive of a specific infectious disease characterized by a triad of fever, rash, and strawberry tongue, which is a classic manifestation of Kawasaki disease in children.
**Why the Correct Answer is Right**
Kawasaki disease is an acute febrile illness of unknown etiology, primarily affecting children under the age of 5. The clinical features of Kawasaki disease include fever lasting more than 5 days, polymorphic rash, erythema of palms and soles (known as "peeling hands and feet"), unilateral cervical lymphadenopathy, and strawberry tongue. The disease is thought to be caused by an infectious agent, but the exact pathogenesis remains unclear. The inflammation of blood vessels (vasculitis) is a key feature of Kawasaki disease, which can lead to complications such as coronary artery aneurysms.
**Why Each Wrong Option is Incorrect**
**Option A:** This is not a correct answer as the clinical features of the patient do not match that of Scarlet Fever, which is characterized by a distinctive "strawberry tongue" but also involves a sandpapery rash and often abdominal pain.
**Option B:** This is not a correct answer as the clinical features of the patient do not match that of Erythema Multiforme, which is characterized by target lesions and often involves mucosal involvement.
**Option C:** This is not a correct answer as the clinical features of the patient do not match that of Toxic Shock Syndrome, which is characterized by fever, rash, and hypotension, but also involves multi-organ involvement.
**Clinical Pearl / High-Yield Fact**
Kawasaki disease is a medical emergency, and prompt treatment with intravenous immunoglobulin (IVIG) and aspirin can significantly reduce the risk of coronary artery complications. It's essential to recognize the classic symptoms early to initiate timely treatment.
**Correct Answer:** B. Kawasaki disease