Figure 1.
Kidney biopsy findings: (a) transplant glomerulitis with infiltrating mononuclear inflammatory cells within the capillary loops, second biopsy (PAS, magnification ×200); (b) glomerulus with a thrombus involving the vascular pole, second biopsy (Jones, magnification ×200); (c) glomeruli showing persistent transplant glomerulitis and thrombotic microangiopathy, fourth biopsy (PAS, magnification ×100); (d) immunofluorescence microscopy showing C4d mesangial deposition without peritubular capillary staining (magnification ×100).