FIGURE 10.

A, This case of isolated cortical hypoplasia is from a 17-day-old with a 4 cm/9.8 g kidney (normal: 4.5 to 6 cm/13 to 19 g). The cortex contains 3 to 5 nephron generations. The medullary tissue at the bottom is normal. B, This is another lobe from the above case has 3 normal nephron generations and fourth generation of aberrantly formed glomeruli just beneath the renal capsule at the top of the image. C, In several lobes from the above case the medullary tissue contained collecting ducts within a dense cellular stroma. Loops of Henle were not present.