AbstractXanthogranulomatous pyelonephritis (XPN) is an uncommon form of chronic pyelonephritis and extremely rare in pediatrics. A six-year-old female presented with a six-month history of recurrent urinary tract infections treated with multiple antibiotics without clinical improvement. Computerized tomography (CT) of the patient’s abdomen/pelvis showed a right renal mass that extended posteriorly into the perinephric space and the right psoas muscle. A CT-guided percutaneous biopsy was performed that ruled out malignancy and showed XPN. Although very rare, XPN should be considered in patients with recurrent or persistent infections of the kidney.
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