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Ultrastructure of the white sponge nevus
Oral Surgery, Oral Medicine, and Oral Pathology
|November 1, 1975
Summary
White sponge nevus exhibits advanced cellular keratinization in the buccal mucosa. Electron microscopy revealed ultrastructural features typical of keratinizing epithelium, indicating a distinct cellular process.
Area of Science:
- Oral pathology
- Dermatopathology
- Electron microscopy
Background:
- White sponge nevus is a rare hereditary benign intraepithelial hyperplasia.
- Histologic examination can underestimate the cellular changes present.
Purpose of the Study:
- To investigate the ultrastructural characteristics of white sponge nevus using electron microscopy.
- To elucidate the cellular mechanisms of keratinization in this condition.
Main Methods:
- Tissue samples diagnosed with white sponge nevus were examined using transmission electron microscopy.
- Detailed ultrastructural analysis focused on keratinization-related features.
Main Results:
- Observed increased intracellular tonofilaments and keratohyaline granules.
- Identified striated membrane-coating granules and their intercellular accumulation.
- Noted keratin-like material within cells, perinuclear electron-lucent zones, and complex interdigitations.
Conclusions:
- Electron microscopy reveals a more advanced keratinization process in white sponge nevus than previously appreciated.
- The ultrastructural findings suggest specific cellular pathways contributing to the lesion's development.