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A 60-year-old male presents with a painful left hip, hematuria, and a creatinine of 1.5 mg/dl. He was recently hospitalized due to fever and chills. It was found that his left hip implant was infected. Blood cultures grew out methicillin-resistant Staphylococcus aureus. After beginning treatment with antibiotics and planning for surgery, a nephrology consult was requested. A kidney biopsy was performed and serologies were ordered. Figure 1 shows segmental endocapillary hypercellularity. Figure 2 shows mild interstitial fibrosis. Figure 3 shows staining with C3 only. All other immunofluorescence stains were negative on the frozen tissue. Immunofluorescence was then performed on the...