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Familial infantile nephrotic syndrome with ocular abnormalities
C Glastre1, P Cochat, R Bouvier
1Unité de Néphrologie Pédiatrique, Hôpital Edouard Herriot, Lyon, France.
Pediatric Nephrology (Berlin, Germany)
|July 1, 1990
Summary
This study describes a severe infantile nephrotic syndrome in siblings with ocular, neurological, and renal abnormalities. The condition, potentially a new entity or severe diffuse mesangial sclerosis, showed rapid progression and was fatal before age one.
Area of Science:
- Pediatric Nephrology
- Medical Genetics
- Ophthalmology
Background:
- Consanguineous parentage increases the risk of autosomal recessive genetic disorders.
- Infantile nephrotic syndrome (INS) presents a diagnostic challenge, especially in severe or atypical forms.
- Ocular and neurological abnormalities are rare but significant co-occurrences in INS.
Observation:
- Two siblings presented with severe infantile nephrotic syndrome, ocular, and neurological deficits.
- One sibling exhibited a micropenis, and both patients died before one year of age.
- Histological examination revealed progressive glomerular and tubular damage, including ultrastructural changes in the glomerular basement membrane.
Findings:
- The renal lesions progressed from mesangial involvement to extensive extracapillary proliferation and tubular dilatations.
- High mitotic activity and nuclear atypia were observed in the renal epithelium.
- Significant ultrastructural alterations of the glomerular basement membrane were a key feature.
Implications:
- These cases may represent a novel genetic disease entity affecting kidney development and function.
- Alternatively, the condition could be a severe, rapidly progressive form of diffuse mesangial sclerosis.
- The findings suggest an autosomal recessive inheritance pattern, highlighting the need for genetic counseling in affected families.