TY - CHAP M1 - Book, Section TI - Focal Segmental Glomerulosclerosis A1 - Dirkx, Tonja C. A1 - Woodell, Tyler B. A2 - Papadakis, Maxine A. A2 - McPhee, Stephen J. A2 - Rabow, Michael W. A2 - McQuaid, Kenneth R. Y1 - 2023 N1 - T2 - Current Medical Diagnosis & Treatment 2023 AB - This relatively common renal pattern of injury results from damage to podocytes; such damage may be a primary/renal-limited disorder or may be secondary to another underlying disease state. Primary causes fall into three categories: (1) heritable abnormalities in any one of several podocyte proteins, or underlying type 4 collagen mutations; (2) polymorphisms in the APOL1 gene in those of sub-Saharan African ancestry; or (3) increased levels of a circulating permeability factor. Secondary causes include renal overwork injury, obesity, hypertension, chronic urinary reflux, HIV or SARS-CoV-2 infection, or analgesic or bisphosphonate exposure. Genetic testing in primary cases is becoming more common, especially in the pediatric population. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/18 UR - accessmedicine.mhmedical.com/content.aspx?aid=1193127509 ER -