Acute cystitis in a 5-yr-old with Kawasaki Disease
Kidney and urinary tract involvement has been well described in patients with Kawasaki disease (KD). Sterile pyuria is the most common abnormal finding in patients with KD who have kidney and urinary tract involvement.

Although pyuria can also originate from the bladder, cystitis has rarely been reported in patients with KD. We described here a case of acute cystitis in a patient with KD. A 5-year-old boy with KD had abdominal pain, miction pain and sterile pyuria.

A computed tomography of the abdomen showed diffuse thickening of the urinary bladder, which was compatible with a diagnosis of acute cystitis. Intravenous immunoglobulin therapy rapidly improved the signs of KD and miction pain.

Key takeaway:-
Healthcare providers should be aware of acute cystitis as a complication of KD if patients have pyuria and/or bladder symptoms.

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