Figure 2

Pathological findings of kidney allograft biopsy at 9 months (A and B), 14 months (C), and 30 months (D) after kidney transplantation. (A) Ischemic changes are observed in the region of the stenotic arterial branch (PAS staining, original magnification x40). (B) Focal segmental glomerulosclerosis (FSGS)-like changes are observed in the region with good blood perfusion (PAS staining, original magnification x40). Allograft biopsy in the well-perfused area performed fourteen (C) and thirty (D) months after kidney transplantation showed marked improvement of FSGS-like changes by repeated percutaneous transluminal arterioplasty of the stenotic arterial branch (Masson's trichrome staining, original magnification x20).