We report a case of ossifying renal tumor of infancy, which presented
as a palpable abdominal mass in an otherwise asymptomatic 10-month-old
girl. The tumor was partially calcified and occupied the renal pelvis
, causing severe hydronephrosis. The differential diagnosis for a pati
ent this age included Wilms tumor, extra-adrenal neuroblastoma, infect
ion, calculus, calcified hematoma and ossifying renal tumor of infancy
. The child underwent heminephrectomy and is currently doing well.