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Tests and diagnosis
By Mayo Clinic staffIf your doctor suspects IgA nephropathy, you may undergo one or more of the following tests:
- Urine test. Blood or protein in the urine may be the first sign of IgA nephropathy. This may be discovered as part of a routine checkup with your doctor. If your doctor suspects that you have problems with your kidneys, you may need to collect your urine for a 24-hour period for additional kidney function tests.
- Blood tests. If you have IgA nephropathy, a blood test may show increased levels of the waste product creatinine in your blood. Sometimes the level of IgA in your blood also is elevated.
- Kidney biopsy. The only way for your doctor to confirm a diagnosis of IgA nephropathy is with a kidney biopsy. This procedure involves using a special biopsy needle to extract small pieces of kidney tissue for microscopic examination to determine if there are IgA deposits in the glomeruli.
References
- IgA nephropathy. National Institute of Diabetes and Digestive and Kidney Diseases. http://kidney.niddk.nih.gov/kudiseases/pubs/iganephropathy/. Accessed Sept. 21, 2010.
- Nephrotic syndrome. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merck.com/mmpe/print/sec17/ch235/ch235b.html. Accessed Sept. 22, 2010.
- Barrat J, et al. Clinical presentation and diagnosis of IgA nephropathy. http://www.uptodate.com/home/index.html. Accessed Sept. 15, 2010.
- Barrat J, et al. Pathogenesis of IgA nephropathy. http://www.uptodate.com/home/index.html. Accessed Sept. 15, 2010.
- Donadio JV, et al. IgA nephropathy. The New England Journal of Medicine. 2002;347:738.
- Cattran DC, et al. Treatment and prognosis of IgA nephropathy. http://www.uptodate.com/home/index.html. Accessed Sept. 15, 2010.
- Cheng J, et al. Efficacy and safety of glucocorticoids therapy for IgA nephropathy: A meta-analysis of randomized controlled trials. American Journal of Nephrology. 2009;30:315.
- IgA nephropathy. National Kidney Foundation. http://www.kidney.org/atoz/content/iganeph.cfm. Accessed Sept. 22, 2010.
- Anderson CF (expert opinion). Mayo Clinic, Rochester, Minn. Sept. 23, 2010.
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