Figure 2

(A) In an early stage of angiogenesis, an angiogenic cell island (circle) in the glomerulus without a basal lamina and lumen is seen in the semi-thin section of the acute group. X100. (B) In an early stage of angiogenesis, angiogenic cell islands (circles) in the expanded mesangial matrix of the glomeruli are seen in the semi thin section of the chronic group. X100. (C) In the early polarization stage of angiogenesis, two immature capillaries (circles) located inside an expanded dense mesangial matrix of a glomerulus are seen in the semi thin section of the chronic group. Endothelial cells have dense basophilic cytoplasms. X100. (D) In lumen formation stage of angiogenesis, an immature capillary (circle) in an expanded dense mesangial matrix with several vacuoles inside the dense basophilic endothelial cytoplasm is shown in the semi thin section of chronic group glomeruli. X100. (E) In the semi thin section of the chronic group's glomeruli, many macrophages (five ended stars), and immature capillaries (circles) in advanced stage of lumen (four ended stars) formation are seen. X100.