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Linear nevus comedonicus with epidermolytic hyperkeratosis.
Amy K Schecter1, Brian Lester, Teddy D Pan
1Department of Dermatology, Brown Medical School, Providence, RI 02903, USA.
Journal of Cutaneous Pathology
|July 9, 2004
Summary
Nevus comedonicus (NC) can rarely present with follicular epidermolytic hyperkeratosis (EHK). Microscopic examination is crucial for diagnosis and understanding potential genetic transmission risks.
Area of Science:
- Dermatopathology
- Histopathology
- Genetics
Background:
- Nevus comedonicus (NC) is a rare hamartoma characterized by comedone-like follicular openings.
- Association with follicular epidermolytic hyperkeratosis (EHK) is exceptionally uncommon in NC.
- Previous literature documents only eight cases of NC with EHK.
Observation:
- A 46-year-old woman presented with linear nevus comedonicus.
- Histopathologic analysis revealed typical NC features.
- Follicular epithelial walls demonstrated epidermolytic hyperkeratosis.
Findings:
- EHK in this case exhibited characteristic perinuclear vacuolization in the spinosum and granulosum layers.
- Large, irregular keratohyalin granules were observed in the granular cell layer.
- The combined clinical and histopathologic findings confirmed linear NC with EHK.
Implications:
- Microscopic evaluation of suspected NC lesions is vital to identify EHK.
- Patients with NC and EHK should be informed about the rare risk of transmitting a severe form to offspring.
- This case expands the understanding of NC-EHK association and its potential hereditary implications.