MPO and lipoid nephrosis: Because of her history of diabetic retinal hemorrhage, papillary thyroid carcinoma with relatively new onset of distant metastasis, hematuria, low selectivity index (0.247), information based on the negative findings of hypocomplementemia, absence of MPO-ANCA, PR3-ANCA, ds-DNA antibodies, we thought that minimal change nephrotic syndrome (MCNS), membranoproliferative glomerulonephritis (MPGN), and rapidly progressive glomerulonephritis (RPGN) would not be correct diagnoses.