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Nail-patella glomerulopathy without associated constitutional abnormalities.

Craig W Zuppan¹, Douglas A Weeks, Drew Cutler

¹Department of Pathology, Loma Linda University and Medical Center, Loma Linda, California 92354, USA. czuppan@ahs.llumc.edu

Ultrastructural Pathology

|January 8, 2004

Summary

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Nail-patella syndrome, a genetic disorder, can manifest unusually. Electron microscopy revealed collagen fibrils in kidney basement membranes, indicating nail-patella syndrome without typical physical signs.

Area of Science:

Nephrology
Genetics
Pathology

Background:

A 17-year-old male presented with persistent hematuria and proteinuria.
No signs of renal insufficiency were observed.
Kidney biopsy was performed for further investigation.

Observation:

Routine light microscopy and immunofluorescence showed nonspecific findings.
Electron microscopy revealed collagen fibrils within capillary wall basement membranes.
These findings are characteristic of nail-patella syndrome.

Findings:

Despite electron microscopy findings, physical examination and radiographs showed normal nails, patellae, and knees.
This suggests an atypical presentation of nail-patella syndrome.
Glomerular changes were present without the usual constitutional abnormalities.

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Implications:

This case highlights the importance of electron microscopy in diagnosing rare genetic kidney diseases.
It expands the known spectrum of nail-patella syndrome manifestations.
Further research may clarify the genetic and molecular mechanisms underlying this unusual presentation.