Clinical and histopathological prognostic factors affecting the renal outcomes in childhood ANCA-associated vasculitis
Antineutrophil cytoplasmic antibody (ANCA)–associated vasculitides (AAV) are very rare in childhood with an increased risk of morbidity and mortality. We aimed to evaluate renal prognostic factors in childhood AAV from the perspective of ANCA serotype, histopathological classification, and five-factor score (FFS).
Pediatric AAV patients from 11 referral centers in Turkey had been included to the study. The demographics, clinical findings, AAV subtypes, outcomes, and FFS were evaluated retrospectively. Kidney biopsies were classified histopathologically.
Totally, 39 patients were enrolled in the study. Among all patients, 74.4% had renal involvement, 56.4% ear-throat-nose involvement, and 51.3% had musculoskeletal involvement. Proteinase 3 (PR3)-ANCA was positive in 48.7%, and myeloperoxidase (MPO)-ANCA was positive in 30.8%. 69.2% of patients had impaired renal function, and 28.2% had progressed to end-stage renal disease (ESRD) during the follow-up. At the time of diagnosis, FFS was ≥ 2 in 53.8%. The most common histopathologic classifications were as follows: crescentic type in 40.7% and sclerotic type in 25.9%. Gastrointestinal and renal involvement, MPO-ANCA positivity, serum creatinine levels, and impaired renal function during the follow-up were significantly higher in patients with FFS ≥ 2, compared to patients with FFS < 2. Patients with FFS ≥ 2 had more common crescentic, mixed and sclerotic histopathologic findings in biopsies. By logistic regression analysis forward method, the strongest single-risk factor among all the parameters was the initial level of creatinine in patients with ESRD, compared to the other patients (p = 0,007).
Evaluation of the FFS, ANCA serology, and the creatinine levels may help to predict renal prognosis.
KeywordsAntineutrophil cytoplasmic antibody–associated vasculitides Five-factor score Renal involvement ANCA Histopathology
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- 1.Jennette JC, Falk RJ, Bacon PA, Basu N, Cid MC, Ferrario F, Flores-Suarez LF, Gross WL, Guillevin L, Hagen EC, Hoffman GS, Jayne DR, Kallenberg CG, Lamprecht P, Langford CA, Luqmani RA, Mahr AD, Matteson EL, Merkel PA, Ozen S, Pusey CD, Rasmussen N, Rees AJ, Scott DG, Specks U, Stone JH, Takahashi K, Watts RA (2013) 2012 revised International Chapel Hill Consensus Conference Nomenclature of Vasculitides. Arthritis Rheum 65:1–11CrossRefGoogle Scholar
- 7.Guillevin L, Pagnoux C, Seror R, Mahr A, Mouthon L, Le Toumelin P, French Vasculitis Study Group (FVSG) (2011) The five-factor score revisited: assessment of prognoses of systemic necrotizing vasculitides based on the French Vasculitis Study Group (FVSG) cohort. Medicine 90:19–27CrossRefGoogle Scholar
- 10.Chen YX, Xu J, Pan XX, Shen PY, Li X, Ren H, Chen XN, Ni LY, Zhang W, Chen N (2017) Histopathological classification and renal outcome in patients with antineutrophil cytoplasmic antibodies-associated renal vasculitis: a study of 186 patients and metaanalysis. J Rheumatol 44:304–313CrossRefGoogle Scholar
- 11.Ozen S, Pistorio A, Iusan SM, Bakkaloglu A, Herlin T, Brik R, Buoncompagni A, Lazar C, Bilge I, Uziel Y, Rigante D, Cantarini L, Hilario MO, Silva CA, Alegria M, Norambuena X, Belot A, Berkun Y, Estrella AI, Olivieri AN, Alpigiani MG, Rumba I, Sztajnbok F, Tambic-Bukovac L, Breda L, Al-Mayouf S, Mihaylova D, Chasnyk V, Sengler C, Klein-Gitelman M, Djeddi D, Nuno L, Pruunsild C, Brunner J, Kondi A, Pagava K, Pederzoli S, Martini A, Ruperto N, Paediatric Rheumatology International Trials Organisation (PRINTO) (2010) EULAR/PRINTO/PRES criteria for Henoch-Schonlein purpura, childhood polyarteritis nodosa, childhood Wegener granulomatosis and childhood Takayasu arteritis: Ankara 2008. Part II: Final classification criteria. Ann Rheum Dis 69:798–806CrossRefGoogle Scholar
- 13.Masi AT, Hunder GG, Lie JT, Michel BA, Bloch DA, Arend WP, Calabrese LH, Edworthy SM, Fauci AS, Leavitt RY, Lightfoot RW, McShane DJ, Mills JA, Stevens MB, Wallace SL, Zvaifle NJ (1990) The American College of Rheumatology 1990 criteria for the classification of Churg-Strauss syndrome (allergic granulomatosis and angiitis). Arthritis Rheum 33:1094–1100CrossRefGoogle Scholar
- 16.Hellmich B, Flossmann O, Gross WL, Bacon P, Cohen-Tervaert JW, Guillevin L, Jayne D, Mahr A, Merkel PA, Raspe H, Scott DG, Witter J, Yazici H (2007) EULAR recommendations for conducting clinical studies and/or clinical trials in systemic vasculitis: focus on anti-neutrophil cytoplasm antibody-associated vasculitis. Ann Rheum Dis 66:605–617CrossRefGoogle Scholar
- 17.Ozen S, Bakkaloglu A, Dusunsel R, Soylemezoglu O, Ozaltin F, Poyrazoglu H, Kasapcopur O, Ozkaya O, Yalcinkaya F, Balat A, Kural N, Donmez O, Alpay H, Anarat A, Mir S, Gur-Guven A, Sonmez F, Gok F, Turkish Pediatric Vasculitis Study Group (2007) Childhood vasculitides in Turkey: a nationwide survey. Clin Rheumatol 26:196–200PubMedGoogle Scholar
- 20.Sacri AS, Chambaraud T, Ranchin B, Florkin B, Sée H, Decramer S, Flodrops H, Ulinski T, Allain-Launay E, Boyer O, Dunand O, Fischbach M, Hachulla E, Pietrement C, Le Pogamp P, Stephan JL, Belot A, Nivet H, Nobili F, Guillevin L, Quartier P, Deschênes G, Salomon R, Essig M, Harambat J (2015) Clinical characteristics and outcomes of childhood-onset ANCA-associated vasculitis: a French nationwide study. Nephrol Dial Transplant 30:104–112Google Scholar
- 21.Cabral DA, Canter DL, Muscal E, Nanda K, Wahezi DM, Spalding SJ, Twilt M, Benseler SM, Campillo S, Charuvanij S, Dancey P, Eberhard BA, Elder ME, Hersh A, Higgins GC, Huber AM, Khubchandani R, Kim S, Klein-Gitelman M, Kostik MM, Lawson EF, Lee T, Lubieniecka JM, McCurdy D, Moorthy LN, Morishita KA, Nielsen SM, O'Neil KM, Reiff A, Ristic G, Robinson AB, Sarmiento A, Shenoi S, Toth MB, Van Mater HA, Wagner-Weiner L, Weiss JE, White AJ, Yeung RS, ARChiVe Investigators Network within the PedVas Initiative (2016) Comparing presenting clinical features in 48 children with microscopic polyangiitis to 183 children who have granulomatosis with polyangiitis (Wegener’s): an ARChiVe cohort study. Arthritis Rheum 68:2514–2526CrossRefGoogle Scholar
- 24.Lionaki S, Blyth ER, Hogan SL, Hu Y, Senior BA, Jennette CE, Nachman PH, Jennette JC, Falk RJ (2012) Classification of antineutrophil cytoplasmic autoantibody vasculitides: the role of antineutrophil cytoplasmic autoantibody specificity for myeloperoxidase or proteinase 3 in disease recognition and prognosis. Arthritis Rheum 64:3452–3462CrossRefGoogle Scholar