stage I Wilms tumor
(... wilmz TOO-mer)
The tumor was completely removed by surgery and all of the following are true: (1) cancer was found only in the kidney and did not spread to blood vessels in the renal sinus (the part of the kidney where it joins the ureter) or to the lymph nodes; (2) no cancer cells were found at the edges of the area where the tumor was removed; (3) the outer layer of the kidney did not break open; (4) the tumor did not break open; and (5) a biopsy was not done before the tumor was removed.