C3 and primary membranoproliferative glomerulonephritis: As the biopsy results demonstrated an MPGN pattern of injury with C3 and IgA codominant staining in the capillary loops as well as mesangium, which would be atypical features of IgAV but which could also be consistent with IC-MPGN, the patient's treatment was adjusted on Day 28 of his disease course by the addition of prednisolone 2 mg/kg/day, mycophenolate mofetil (MMF) 450 mg/m2/dose twice daily, and lisinopril.