MKI67 and Nephroblastoma: In stromal type nephroblastoma (Fig. 3G), the median SI was 5% for Ki-67 (range, 1.5%–20%) (Fig. 3H) and 30.5% for cyclin E (range, 10%–69%) (Fig. 3I) in the stromal cells, 28% for Ki-67 (range, 8%–35%) and 30% for cyclin E (range, 25%–35%) in the blastemal component, 12% for Ki-67 (range, 8%–40%) and 40.5% for cyclin E (range, 20%–80%) in the epithelial cells.