Fast Five Quiz: IgA Nephropathy Presentation and Diagnosis

A. Brent Alper, Jr, MD, MPH


September 18, 2023

Eighty percent of episodes of gross hematuria in patients with IgA nephropathy are associated with upper respiratory tract infections, primarily acute pharyngotonsillitis, as well as with gastroenteritis. In these patients, gross hematuria usually appears in the first 48-72 hours from the beginning of the infection and lasts for < 3 days.

Urinary tract infections (eg, pyelonephritis, cystitis, prostatitis, or urethritis) and kidney stones are examples of non-glomerular causes of hematuria.

Pigmenturia, or pseudohematuria, is caused by the presence of dyes, urinary metabolites such as porphyrins and homogentisic acid, as well as certain drugs in the urine. It is a mimicker of hematuria and can easily be confused with the presence of blood in the urine.

Learn more about the clinical presentation of IgA nephropathy.


Comments on Medscape are moderated and should be professional in tone and on topic. You must declare any conflicts of interest related to your comments and responses. Please see our Commenting Guide for further information. We reserve the right to remove posts at our sole discretion.