Acute kidney injury may increase the risk for chronic kidney disease and end-stage renal disease. In an attempt to summarize the literature and provide more compelling evidence, we conducted a systematic review comparing the risk of CKD, ESRD and death in patients with and without AKI. From electronic databases, web search engines, and bibliographies, 13 cohort studies were selected, evaluating long-term renal outcomes and non-renal outcomes in patients with AKI. The pooled incidence of CKD and ESRD were 25.8/100 person-years and 8.6 per 100 person-years, respectively. Patients with AKI had higher risks of developing CKD (pooled adjusted hazard ratio 8.8, 95% CI 3.1-25.5), ESRD (pooled adjusted HR 3.1, 95% CI 1.9-5.0) and mortality (pooled adjusted HR 2.0, 95% CI 1.3-3.1) than patients without AKI. The relationship between AKI and CKD or ESRD was graded depending on the severity of AKI and the effect size was dampened by decreased baseline glomerular filtration rate. Data were limited, but AKI was also independently associated with the risk for cardiovascular disease and congestive heart failure, but not with hospitalization for stroke or all-cause hospitalizations. Meta-regression did not identify any study level factors that were associated with the risk for CKD or ESRD. Our review identifies AKI as an independent risk factor for CKD, ESRD, and death and other important non-renal outcomes.

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Granulomatosis with polyangiitis (GPA) is a relatively rare systemic autoimmune disorder of small and medium size blood vessels affecting multiple organs with a wide range of clinical presentations. We present a 57-year-old Caucasian male who presented to the ER with midsternal chest pain. He was hospitalized for non-ST elevated myocardial infarction (NSTEMI) and later diagnosed with pauci-immune necrotizing crescentic glomerulonephritis confirmed with renal biopsy.

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