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Abundant eosinophil infiltration in a neurofibroma
1Department of Dermatology and Institute of Basic Medical Science, Yonsei University Wonju College of Medicine, Wonju, Korea.
The American Journal of Dermatopathology
|April 7, 2007
Summary
Eosinophils were found infiltrating a cutaneous neurofibroma, a previously undocumented occurrence. This suggests mast cells within neurofibromas may be active, not dormant.
Area of Science:
- Dermatology
- Oncology
- Immunology
Background:
- Neurofibromas are benign nerve sheath tumors.
- Mast cells are commonly found in neurofibromas.
- Eosinophil infiltration in neurofibromas has not been previously documented.
Observation:
- A case of sporadic cutaneous neurofibroma in a 72-year-old woman is presented.
- The neurofibroma was located on the left anterior shoulder and present for approximately 10 years.
- Diffuse eosinophil infiltration was observed within the neurofibroma.
Findings:
- This study documents, for the first time, eosinophil infiltration in a cutaneous neurofibroma.
- The presence of eosinophils suggests mast cell activity within the neurofibroma.
- Acid-fast stains are proposed as a method to differentiate mast cell and eosinophil granules.
Implications:
- This finding indicates that mast cells in some neurofibromas may be actively involved in the tumor microenvironment.
- Further research into the role of eosinophils and mast cells in neurofibroma pathogenesis is warranted.
- This case highlights the potential diagnostic utility of specific staining techniques in differentiating cellular components within tumors.
