title: Long-term follow-up of type III membranoproliferative glomerulonephritis in children.
abstract: Seven patients with type III membranoproliferative glomerulonephritis (MPGN) were followed for 9-17 years. Their mean age at presentation was 11.0 years. Their urinary abnormalities were detected by school urinary screening in five, and two patients presented with nephrotic syndrome. With time, urinalysis became normal in five, proteinuria persisted in one and nephrotic syndrome persisted in one. All had serum creatinine levels below 1 mg/dl at the last follow-up. All were initially hypocomplementemic. Serum C3 levels became normal in five patients but decreased again in three without clinical changes. Mesangial proliferation was initially slight or moderate in five but, except for one patient, histological changes persisted in follow-up biopsies even though in two the urinalysis became normal. Electron micrographic studies using silver-methenamine staining revealed subepithelial and subendothelial deposits associated with basement membrane disruption and layering of the lamina densa, an abnormality typical of MPGN type III. These observations suggest long-term outcome of type III MPGN is good despite persisting changes in type III lesions.
authors.affiliation: Department of Pediatrics, Kitasato University Hospital, 8-3-6 Fukaminishi, Yamato-shi, Kanagawa 242-8602, Japan. kikuo.iitaka@gov.city.yamato.kanagawa.jp
authors.forename: Kikuo
authors.initials: K
authors.lastname: Iitaka
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Moriya
authors.forename: Shinya
authors.initials: S
authors.lastname: Nakamura
authors.forename: Kaori
authors.initials: K
authors.lastname: Tomonaga
authors.forename: Tadasu
authors.initials: T
authors.lastname: Sakai
mesh_terms: D000293:Adolescent; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use; D001379:Azathioprine / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D003176:Complement C3 / Q000378:metabolism; D003520:Cyclophosphamide / Q000627:therapeutic use; D004359:Drug Therapy, Combination; D005260:Female; D005455:Fluorescent Antibody Technique; D005500:Follow-Up Studies; D015432:Glomerulonephritis, Membranoproliferative / Q000145:classification* / Q000188:drug therapy / Q000473:pathology / Q000503:physiopathology; D005938:Glucocorticoids / Q000627:therapeutic use; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D007213:Indomethacin / Q000627:therapeutic use; D007668:Kidney / Q000473:pathology / Q000503:physiopathology; D007678:Kidney Glomerulus / Q000473:pathology; D008297:Male; D008854:Microscopy, Electron; D011239:Prednisolone / Q000627:therapeutic use
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D003176:Complement C3; D005938:Glucocorticoids; D007166:Immunosuppressive Agents; D003520:Cyclophosphamide; D011239:Prednisolone; D001379:Azathioprine; D007213:Indomethacin