[Glomerular nephropathy in the Bardet-Biedl syndrome]

Area of Science:

• Nephrology
• Genetics
• Pathology

Background:

• Bardet-Biedl syndrome (BBS) is a rare genetic disorder.
• Kidney disease and renal failure are known complications of BBS.
• The specific renal pathologies in BBS require further elucidation.

Observation:

• A case of Bardet-Biedl syndrome presenting with end-stage renal disease.
• Light microscopy revealed glomerular fibrosis, tubular alteration, and interstitial fibrosis without cysts.
• Electron microscopy showed thickened and abnormal glomerular basement membranes (GBM) with associated fibrillary material.

Findings:

• The patient developed chronic renal failure requiring peritoneal dialysis.
• Death occurred due to a duodenal ulcer after one year of dialysis.
• Tubulointerstitial lesions and GBM abnormalities were noted in the kidneys.

Implications:

• Chronic renal failure is a frequent cause of mortality in Bardet-Biedl syndrome.
• Glomerular damage, particularly GBM abnormalities, may play a significant role in BBS nephropathy.
• Further research is needed to understand the incidence and specificity of GBM changes in BBS.