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Lysozyme-Induced Nephropathy Secondary To Chronic Myelomonocytic Leukemia, Vasudevan Mahalingam, Jamal Abukhaled, Ping Zhang

Conference Presentation Abstracts

Lysozyme-induced nephropathy is a rare cause of acute kidney injury (AKI) in patients with chronic myelomonocytic leukemia (CMML). We report the case of an 85-year-old man with type II diabetes and hypertension who was being evaluated for an elevated serum creatinine of 2.27 mg/dL. Additional studies showed proteinuria (1 g), predominantly nonalbumin, along with an IgA λ monoclonal protein found on serum electrophoresis. His serum κ:λ ratio, however, was elevated and urinalysis showed free κ monoclonal protein. Further hematopathologic workup revealed CMML, and he also had progression of his AKI, for which a renal biopsy was performed. Light microscopy showed …