Editing Wilms' tumor (section)

==== Stage I ====
In Stage I Wilms' tumor (43% of cases), all of the following criteria must be met: {{citation needed|date=April 2021}}
* Tumor is limited to the [[kidney]] and is completely excised .
* The surface of the [[renal capsule]] is intact.
* The tumor is not ruptured or biopsied (open or needle) prior to removal.
* No involvement of extrarenal or renal sinus lymph-vascular spaces
* No residual tumor apparent beyond the margins of excision.
* Metastasis of tumor to lymph nodes not identified.