Primary hydatid cyst of the kidney in a 10 year old boy.

INTRODUCTION Kidney involvement in echinococcosis is extremely rare, accounting for only 2-3% of all cases. Primary involvement of the kidney with sparing the liver and lungs is even more rare.(1) We report a rare case of primary renal hydatid disease presenting with suprapubic and left loin pain. In this case, the disease mimicked renal tumor. Successful treatment was accomplished using radical nephrectomy.