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Regression in skin tumours: a common phenomenon.
1Department of Dermatology (University of Sydney), Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia.
The Australasian Journal of Dermatology
|June 1, 1997
Summary
Skin tumors often regress, sometimes completely. Activated CD4+ T lymphocytes likely mediate this regression in epithelial skin tumors, potentially through cytokine secretion.
Area of Science:
- Dermatology
- Immunology
- Oncology
Background:
- Regression, both partial and complete, is a recognized phenomenon in epithelial skin tumors.
- Keratoacanthoma and familial self-healing epithelioma exhibit nearly complete tumor regression.
- Melanoma and basal cell carcinoma show evidence of partial regression in 25% and 50% of cases, respectively, though total regression rates are unknown.
Purpose of the Study:
- To investigate the immunological mechanisms underlying spontaneous regression of epithelial skin tumors.
- To identify the specific immune cells and mediators involved in tumor regression.
Main Methods:
- Histological examination of skin tumors to assess regression.
- Immunological assays to identify infiltrating lymphocytes and cytokine profiles (details not provided in the abstract).
Main Results:
- Previous laboratory studies suggest activated CD4+ T lymphocytes play a role in skin tumor regression.
- Cytokine secretion by these lymphocytes is a potential mechanism mediating regression.
Conclusions:
- Activated CD4+ T lymphocytes are implicated as the primary mediators of epithelial skin tumor regression.
- Cytokine-mediated signaling is a likely pathway through which these immune cells induce tumor regression.