title: Increased incidence of recurrent hematuria in ankylosing spondylitis: a possible association with IgA nephropathy.
abstract: A retrospective analysis of our patients with ankylosing spondylitis revealed a 17.8% incidence of recurrent hematuria. Two of the five patients with recurrent hematuria had previously undergone renal biopsies showing a focal proliferative glomerulonephritis. The only specimen examined by immunofluorescent staining showed the typical changes of IgA nephropathy. A control group of patients with rheumatoid arthritis did not show recurrent hematuria. Recurrent hematuria may be a frequent occurrence in ankylosing spondylitis and may signify the presence of one of the glomerulonephritides such as IgA nephropathy.
mesh_terms: D000328:Adult; D005921:Glomerulonephritis / Q000150:complications*; D006417:Hematuria / Q000150:complications* / Q000453:epidemiology; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D012189:Retrospective Studies; D013167:Spondylitis, Ankylosing / Q000150:complications*; D014556:Urine / Q000032:analysis
chemical_list: D007070:Immunoglobulin A