Clinical data were compiled from review of medical records. To evaluate glomerular mesangial proliferation (Kidney International 76:54,2009), cellularity of each glomerulus was graded (1-mild, 2-moderate, 3-severe) and a mean mesangial score calculated

for each biopsy. 110 patients with known date of purpura onset were grouped based on interval from the onset to renal biopsy: group 1 (G1, <1 month, n = 14); group 2 (G2, 1–6 months, n = 58) and group 3 (G3, >6 months, n = 38). Results: All patients had purpura, proteinuria (average 2.07 g/24 h), and microscopic, but not macroscopic, hematuria. 4.4% patients had eGFR [CG] <50 mL/min, 27% had abdominal pain and 26% had joint pain. Increased serum IgA (>3.9 g/L) was present in 18%. G1-G3 groups had similar mean 24-h proteinuria, hematuria (microscopic count of RBC in urinary sediment), mean eGFR and frequency of ACEI/ARB treatment, but the percentage of blood neutrophils differed check details between the groups buy RG7204 (G1 = 71%, G2 = 66%, G3 = 57%, p < 0.001). Histopathology of the cohort showed mean mesangial score 1.1 (range 0.29–2.38) and segmental sclerosis (18%), global sclerosis (26%), glomerular crescents (56%), glomerular adhesion (26%), tubular atrophy (43%), tubular casts (46%), interstitial fibrosis (39%), and interstitial lymphocytes (51%). Groups G1-G3 did not differ in histopathology, except for median percentage of glomeruli with lymphocytes (G1 = 57%,

G2 = 10%, G3 = 21%, p < 0.001) and mean percentage of interstitial fibrosis (G1 = 36%, G2 = 31%, G3 = 55%, p = 0.05). Conclusion: Patients biopsied <1 month from purpura onset (G1) had higher percentage of glomerular lymphocytes and blood neutrophils. Severity of crescents was not related to the timing of biopsy after onset of purpura. This large cohort can serve for comparison with data on adult HSPN patients in other geographic locations. KANKI TOMOKO, MORIMOTO KATSUHIKO, AKAI YASUHIRO,

TANABE KAORI, OKAMOTO KEISUKE, MATSUI MASARU, SAMEJIMA KENICHI, SAITO YOSHIHIKO First Department of Internal Medicine, Nara Medical University Introduction: Glomerulonephritis associated with IgA vasculitis (Henoch-Schönlein purpura) has relatively good prognosis among various nephritic disorders, but in adult it could cause end-stage renal failure or 5-Fluoracil in vivo death. We investigated the prognostic parameters predicting renal and survival outcome in the patients with IgA vasculitis. Methods: Seventy-one patients with biopsy-proven IgA vasculitis were enrolled in this study. They were retrospectively analyzed in order to investigate the relations among clinical features and parameters, renal pathological findings, and renal and survival outcome. Results: The background features of 71 cases of IgA vasculitis were as follows: 37 males and 34 females, mean age of 44.3 ± 21.2 years old on presentation, the average observation period of 67.6 ± 83.4 months, daily urinary protein 2.4 ± 3.0 g/gCr on presentation.