Table 1.

The revised Sociétè Internationale d`Oncologie Pédiatrique classification of renal tumours of childhood[1,2]

Risk	Histology
Low risk	Mesoblastic nephroma
	Cystic partially differentiated nephroblastoma
	Nephroblastoma - Completely necrotic
Intermediate	Nephroblastoma - Epithelial type
	Nephroblastoma - Stromal type
	Nephroblastoma - Mixed type
	Nephroblastoma - Regressive type
	Nephroblastoma - Focal anaplastic type
High	Nephroblastoma - Blastemal type
	Nephroblastoma - Diffuse anaplasia
	Clear cell sarcoma of the kidney
	Rhabdoid tumour of the kidney