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Related Experiment Videos

Hematuria in thin basement membrane nephropathy.

David K Packham1, Vlado Perkovic, Judy Savige

  • 1Department of Medicine, University of Melbourne, Melbourne, Australia. dmpackham@netspace.net.au

Seminars in Nephrology
|May 10, 2005
PubMed
Summary

Thin basement membrane nephropathy (TBMN) causes persistent hematuria in most patients. However, some individuals may experience intermittent or resolved hematuria over time.

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Area of Science:

  • Nephrology
  • Urology
  • Pathology

Background:

  • Thin basement membrane nephropathy (TBMN) is a common cause of persistent glomerular hematuria.
  • Diagnosis often relies on clinical presentation with microscopic hematuria and minimal proteinuria.
  • Kidney function is typically normal in TBMN patients.

Purpose of the Study:

  • To investigate the persistence and variability of hematuria in biopsy-proven TBMN.
  • To analyze the long-term course of urinary red blood cell (RBC) excretion in TBMN patients.

Main Methods:

  • Study included 112 patients with biopsy-proven TBMN and initial hematuria.
  • Longitudinal follow-up of 75 patients over a median of 48 months.
  • Analysis of 485 urine specimens using phase-contrast microscopy for RBC detection.

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Main Results:

  • All patients presented with hematuria (mean RBC count 256 x 10^3/mL).
  • 28% of patients had at least one urine specimen without hematuria.
  • Of those with no hematuria, 52% had normal RBC counts, while 48% experienced recurrence.

Conclusions:

  • Hematuria is a persistent finding in the majority of TBMN patients.
  • However, hematuria can occasionally resolve or be intermittent in TBMN.
  • This variability necessitates careful monitoring of TBMN patients.