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  Indian J Med Microbiol
 

Figure 1: (a) Light microscopic examination at low power shows dilated distal convoluted tubules with mildly PAS positive casts in their lumen (Per iodic acid Schiff stain × 100); (b) Higher magnification of tubular casts demonstrate their fractured nature and surrounding inflammatory cell reaction (Per iodic acid Schiff stain ×400); (c) Damaged PTE showing pale eosinophilic material which is difficult to distinguish from necrotic epithelial debris. The angulated edges of the deposits are appreciated focally, on high power examination (Per iodic acid Schiff stain × 200); (d) High power magnification reveals angulated outlines of deposits within the PTE and tubular lumen (Per iodic acid Schiff stain × 400); (e) Semithin sections display numerous inclusions in PTE at low power examination along with concomitant myeloma cast nephropathy (toluidine blue stain × 200); (f) Higher magnification of PTE inclusions reveal them to be angulated crystalloid structures (oil immersion, toluidine blue stain × 1000)

Figure 1: (a) Light microscopic examination at low power shows dilated distal convoluted tubules with mildly PAS positive casts in their lumen (Per iodic acid Schiff stain × 100); (b) Higher magnification of tubular casts demonstrate their fractured nature and surrounding inflammatory cell reaction (Per iodic acid Schiff stain ×400); (c) Damaged PTE showing pale eosinophilic material which is difficult to distinguish from necrotic epithelial debris. The angulated edges of the deposits are appreciated focally, on high power examination (Per iodic acid Schiff stain × 200); (d) High power magnification reveals angulated outlines of deposits within the PTE and tubular lumen (Per iodic acid Schiff stain × 400); (e) Semithin sections display numerous inclusions in PTE at low power examination along with concomitant myeloma cast nephropathy (toluidine blue stain × 200); (f) Higher magnification of PTE inclusions reveal them to be angulated crystalloid structures (oil immersion, toluidine blue stain × 1000)