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Cutaneous heterotopic meningeal nodules
J M Theaker1, C D Fletcher, A J Tudway
1Department of Histopathology, Southampton General Hospital, UK.
Histopathology
|May 1, 1990
Summary
Primary cutaneous meningiomas are rare congenital scalp nodules. These lesions exhibit specific microscopic features and vimentin expression, similar to intracranial meningiomas.
Area of Science:
- Dermatology
- Pathology
- Oncology
Background:
- Cutaneous heterotopic meningeal nodules, also known as primary cutaneous meningiomas, are rare lesions.
- These typically present at birth or in childhood as small subcutaneous nodules on the scalp or back.
Purpose of the Study:
- To describe the clinical, light microscopic, and immunohistochemical features of primary cutaneous meningiomas.
- To identify key diagnostic features and potential developmental associations.
Main Methods:
- Clinical examination of six patients.
- Light microscopy of lesion architecture and cytology.
- Immunohistochemical analysis for vimentin and epithelial membrane antigen.
Main Results:
- Lesions presented as small subcutaneous fibrous nodules with variable microscopic architecture.
- Diagnostic features included psammoma bodies and small collagenous bodies.
- Immunohistochemistry revealed widespread vimentin expression and, in most cases, epithelial membrane antigen expression.
Conclusions:
- Primary cutaneous meningiomas are distinct entities with specific histological and immunohistochemical profiles.
- An association with nerves may be relevant to their development.
- Immunohistochemical findings are consistent with intracranial meningiomas.