{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,11]],"date-time":"2026-08-11T20:29:55Z","timestamp":1786480195992,"version":"build-2736575974"},"reference-count":35,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Kidney360"],"published-print":{"date-parts":[[2020,6]]},"abstract":"\n Background<\/jats:title>\n \n Common variable immunodeficiency (CVID) is one of the most common primary immunodeficiency syndromes, affecting one in 25,000\u201350,000 people. Renal insufficiency occurs in approximately 2% of patients with CVID. To date, there are no case series of renal biopsies from patients with CVID, making it difficult to determine whether individual cases of renal disease in CVID represent sporadic events or are related to the underlying pathophysiology. We performed a retrospective analysis of renal biopsy specimens in our database from patients with a clinical history of CVID (\n n<\/jats:italic>\n =22 patients, 27 biopsies).\n <\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n Light, immunofluorescence, and electron microscopy were reviewed. IgG subclasses, PLA2R immunohistochemistry, and THSD7A, EXT1, and NELL1 immunofluorescence were performed on all membranous glomerulopathy cases. CD3, CD4, CD8, and CD20 immunohistochemistry was performed on cases of tubulointerstitial nephritis.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n AKI and proteinuria were the leading indications for renal biopsy in patients with CVID. Immune-complex glomerulopathy was present in 12 of 22 (54.5%) cases, including nine cases with membranous glomerulopathy, one case with a C3 glomerulopathy, and one case with membranoproliferative GN with IgG3\n \u03ba<\/jats:italic>\n deposits. All membranous glomerulopathy cases were PLA2R, THSD7A, EXT1, and NELL1 negative. The second most common renal biopsy diagnosis was chronic tubulointerstitial nephritis, affecting 33% of patients. All tubulointerstitial nephritis cases showed tubulitis and a lymphocytic infiltrate with >90% CD3\n +<\/jats:sup>\n T cells. Other renal biopsy diagnoses within our cohort included acute tubular injury (\n n<\/jats:italic>\n =1), amyloid light-chain amyloidosis (\n n<\/jats:italic>\n =1), diabetic glomerulosclerosis (\n n<\/jats:italic>\n =1), thin basement membranes (\n n<\/jats:italic>\n =1), pauci-immune GN (\n n<\/jats:italic>\n =1), and arterionephrosclerosis (\n n<\/jats:italic>\n =1).\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n Membranous glomerulopathy and tubulointerstitial nephritis were the predominant pathologic findings in patients with CVID. Membranous glomerulopathy cases in patients with CVID were IgG1 subclass dominant and showed mesangial immune deposits. Four of the membranous glomerulopathy cases had associated proliferation, with mesangial and\/or endocapillary hypercellularity, with or without crescent formation. CVID should be considered as a potential cause when membranous glomerulopathy or chronic tubulointerstitial nephritis is seen in a young patient with a history of recurrent infections.<\/jats:p>\n <\/jats:sec>","DOI":"10.34067\/kid.0000432020","type":"journal-article","created":{"date-parts":[[2020,4,21]],"date-time":"2020-04-21T22:01:08Z","timestamp":1587506468000},"page":"491-500","source":"Crossref","is-referenced-by-count":15,"title":["Renal Manifestations of Common Variable Immunodeficiency"],"prefix":"10.34067","volume":"1","author":[{"given":"Tiffany N.","family":"Caza","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Samar I.","family":"Hassen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher 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