How is Kawasaki Disease diagnosed?

Kawasaki Disease is a rare but serious condition that primarily affects children under the age of five. It is characterized by inflammation of the blood vessels throughout the body, including the coronary arteries that supply blood to the heart. Early diagnosis and treatment are crucial to prevent potential complications, such as heart problems.

Diagnosing Kawasaki Disease

Diagnosing Kawasaki Disease can be challenging as there is no specific test available to confirm the condition. Instead, healthcare professionals rely on a combination of clinical signs, symptoms, and medical history to make an accurate diagnosis. The diagnostic process typically involves:

1. Medical History: The doctor will begin by asking questions about the child's symptoms, their duration, and any previous illnesses. They will also inquire about family history, as there may be a genetic predisposition to Kawasaki Disease.



2. Physical Examination: A thorough physical examination is conducted to assess the child's overall health and look for characteristic signs of Kawasaki Disease. The doctor will check for:





• Fever: Persistent high fever (above 101.3°F or 38.5°C) lasting for at least five days is a hallmark symptom of Kawasaki Disease.


• Rash: The child may develop a rash, often on the trunk, that appears as small, raised red or purple bumps.


• Red Eyes: Conjunctivitis, or redness of the eyes without discharge, is commonly observed.


• Swollen Lymph Nodes: The doctor will check for enlarged lymph nodes, particularly in the neck region.


• Changes in the Mouth and Lips: Kawasaki Disease can cause redness, dryness, and cracking of the lips, as well as a strawberry-like appearance of the tongue.


• Changes in the Hands and Feet: Swelling and redness of the hands and feet, followed by peeling of the skin, may occur.





3. Laboratory Tests: While there is no specific blood test for Kawasaki Disease, certain laboratory tests can help support the diagnosis and rule out other conditions. These may include:





• Complete Blood Count (CBC): This test measures the levels of different blood cells and can reveal an elevated white blood cell count and increased platelet count, which are common in Kawasaki Disease.


• C-Reactive Protein (CRP) and Erythrocyte Sedimentation Rate (ESR): These tests assess the presence of inflammation in the body. Elevated levels of CRP and ESR are often seen in Kawasaki Disease.


• Liver Function Tests: Kawasaki Disease can affect liver function, so these tests may be performed to evaluate liver enzymes.


• Urinalysis: A urine sample may be analyzed to check for abnormalities.





4. Echocardiogram: An echocardiogram is a key diagnostic tool used to evaluate the heart's structure and function. It helps identify any abnormalities in the coronary arteries, such as dilation or aneurysms, which can occur in Kawasaki Disease. This non-invasive test uses sound waves to create images of the heart.

Consulting a Specialist

If Kawasaki Disease is suspected, it is important to consult a pediatrician or a specialist experienced in diagnosing and treating the condition. Prompt referral to a pediatric cardiologist is often necessary to assess and monitor the heart's involvement.

Final Thoughts

While the diagnosis of Kawasaki Disease can be challenging, a combination of clinical evaluation, medical history, physical examination, laboratory tests, and echocardiogram can help healthcare professionals make an accurate diagnosis. Early detection is crucial to initiate appropriate treatment and prevent potential complications.