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Collodion baby and lamellar ichthyosis
1Department of Dermatology & Syphilology, Wayne State University School of Medicine, Detroit, Michigan, USA.
Journal of Cutaneous Pathology
|April 1, 1998
Summary
Electron microscopy can differentiate severe collodion baby from harlequin ichthyosis at birth. The absence of the marginal band in stratum corneum cells indicates collodion baby, aiding early diagnosis.
Area of Science:
- Dermatology
- Genetics
- Histology
Background:
- Differentiating collodion baby and harlequin ichthyosis is crucial due to survival rates.
- Some infants present with overlapping features, complicating clinical diagnosis.
Observation:
- A case study of an infant initially presenting with harlequin-like features, evolving into lamellar ichthyosis.
- Serial electron microscopy (EM) of skin biopsy specimens was performed at 7, 14, and 150 days.
- Comparison with established cases of harlequin ichthyosis and lamellar ichthyosis was conducted.
Findings:
- The marginal band of stratum corneum cells was absent in the infant's initial presentation (collodion/harlequin-like).
- A well-formed marginal band was observed when the infant's condition evolved into lamellar ichthyosis.
- Key harlequin ichthyosis features like giant mitochondria were absent in this case.
Implications:
- Electron microscopy may offer a method to distinguish severe collodion baby from harlequin ichthyosis at birth.
- Absence of the marginal band via EM is a potential diagnostic marker for collodion baby.
- This study refines diagnostic criteria for severe ichthyosis subtypes.