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Keratoderma hereditaria mutilans. Etretinate treatment and electron microscope studies.
P Palungwachira1, K Iwahara, H Ogawa
1Institute of Dermatology, Bangkok, Thailand.
The Australasian Journal of Dermatology
|January 1, 1992
Summary
Keratoderma hereditaria mutilans, a rare inherited disorder, causes palm/sole hyperkeratosis and digit constriction. Treatment improved ultrastructural features like reduced mitochondrial swelling and membrane coating granules.
Area of Science:
- Dermatology
- Genetics
- Cell Biology
Background:
- Keratoderma hereditaria mutilans is a rare inherited disorder of keratinization.
- It presents with palmoplantar hyperkeratosis, pseudo-ainhum, and risk of autoamputation.
- Ultrastructural characteristics remain poorly understood.
Observation:
- A case of Keratoderma hereditaria mutilans was studied clinically, histologically, and ultrastructurally.
- Pre-treatment biopsy revealed hyperkeratosis, acanthosis, swollen mitochondria, abundant desmosomes, and membrane coating granules (MCGs) in corneocytes.
- Post-treatment with etretinate showed clinical improvement with specific ultrastructural modifications.
Findings:
- Ultrastructural analysis identified swollen mitochondria and numerous desmosomes in spinous and granular cells.
- Corneocytes showed abundant MCGs and lipid-like vacuoles.
- Post-treatment, reduced mitochondrial swelling and fewer MCGs were observed, alongside increased intercellular granular substances and Langerhans cell stimulation.
Implications:
- This study provides detailed ultrastructural insights into Keratoderma hereditaria mutilans.
- It elucidates the cellular mechanisms affected by the disorder and its treatment.
- Understanding these ultrastructural changes aids in characterizing the disease and evaluating therapeutic responses.