title: IgA nephropathy associated with psoriasis vulgaris: a contribution to the entity of 'psoriatic nephropathy'.
abstract: BACKGROUND
  It is generally accepted that there is no higher prevalence of renal disease in psoriatic patients, except in the case of secondary renal amyloidosis in psoriatic arthropathy. Contrary to this, however, some authors suggest that kidney diseases in psoriasis vulgaris may be more common and they presume the existence of 'psoriatic nephropathy'.
  
  
  METHODS
  We report a case of IgA nephropathy in a patient with psoriasis vulgaris as a contribution to the ongoing discussion concerning this entity of 'psoriatic nephropathy'.
  
  
  RESULTS
  A 62-year-old man with a history of psoriasis vulgaris, without evidence of psoriatic arthropathy, was admitted to hospital for nephrotic proteinuria 6.74 g/day and a moderate decrease of glomerular filtration rate with a serum creatinine level of 213 micromol/L and creatinine clearance of 0.95 ml/s. Kidney biopsy revealed IgA nephropathy with vascular nephrosclerosis and tubulointerstitial nephritis. After 1 month of treatment with prednisone 1 mg/kg/day, proteinuria decreased to 2.45 g/day, and skin lesions almost completely resolved.
  
  
  CONCLUSIONS
  About 10 cases of IgA nephropathy associated with psoriasis are referred to in the literature. We report an-other interesting case of IgA nephropathy in a psoriatic patient, as a contribution to the discussion regarding the hypothetical conception of 'psoriatic nephropathy'. We recommend routine urinalysis, careful examination of kidney function and a wider application of renal biopsy in psoriatic patients.
authors.affiliation: Third Department of Internal Medicine, Medical Faculty, Palacky University Olomouc, Olomouc, Czech Republic.
authors.forename: Josef
authors.initials: J
authors.lastname: Zadrazil
authors.forename: Tomás
authors.initials: T
authors.lastname: Tichý
authors.forename: Pavel
authors.initials: P
authors.lastname: Horák
authors.forename: Iva
authors.initials: I
authors.lastname: Nikorjaková
authors.forename: Pavel
authors.initials: P
authors.lastname: Zíma
authors.forename: Karel
authors.initials: K
authors.lastname: Krejcí
authors.forename: Pavel
authors.initials: P
authors.lastname: Strébl
mesh_terms: D005922:Glomerulonephritis, IGA / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D011565:Psoriasis / Q000150:complications*