Abstract
We report a 13-year old boy with left renal cell carcinoma. The patient presented with macrohematuria, left flank pain, and fever as primary symptom. Computed tomography (CT) findings led to diagnosis of a left infected renal cyst. The symptoms rapidly improved with antibiotic therapy: however, microhematuria persisted. A cystic mass with a thin wall enhanced by contrast medium was still found by CT after 2-month treatment, although the mass was reduced in size. Because image diagnosis did not exclude the the possibility of a malignant neoplasm in the kidney, he underwent left laparoscopic nephrectomy. He was histologically diagnosed as having renal cell carcinoma. Xp11 gene translocation was not detected. Renal cell carcinoma in children is rare, and infectious symptoms as the primary presentation are also uncommon. When image diagnosis suggests a spaceoccupying lesion of the kidney in a child having urinary tract infection, careful follow-up is needed to monitor changes of the lesion even after the infection has been improved.
