A 4-Year-old Boy With Right Renal Space-occupying Lesion Diagnosed With Inflammatory Pseudotumor

To report a rare case of a kidney lesion, finally diagnosed as inflammatory pseudotumor, underwent partial nephrectomy and saved the kidney.

Case report and experience sharing.

A 4-year-old boy expressed merely occasionally abdominal pain with space-occupying lesion of the right kidney that was indicative of renal malignant carcinoma. The boy underwent partial nephrectomy and perinephric lymph node dissection, and the mass was histopathologically diagnosed as IPT of renal parenchyma, accompanied with lymph nodes reactive hyperplasia. During the subsequent 20 months' follow-up, the child was all clinically very well, the residual right kidney regrew approximately to the same size as the left one by catch-up growth, remained normal glomerular filtration rate, and did not require additional therapy.

Among the affected organs of IPT, kidney is indeed of rare involvement, especially in children. Children has immeasurable potentiality for restoration and regeneration, IPT of the kidney should be given sufficient attention when confronted patients with renal mass lesion in the differential diagnosis, to avoid unnecessary surgical intervention.