Abstract
Introduction
Ulcerated melanomas may have a unique biology and microenvironment. We test whether markers of immune infiltration correlate with clinical outcome in ulcerated compared to non-ulcerated primary melanoma tumors.
Methods
Sixty-two stage II–III cutaneous melanomas, 32 ulcerated and 30 non-ulcerated, were analyzed for tumor-infiltrating lymphocytes (TILs). Immunohistochemistry (IHC) was performed for CD2, a marker previously shown to correlate with overall survival (OS) and recurrence-free survival (RFS) in this patient population. IHC using antibody, VE1, to BRAF V600E was also performed on a subset of 41 tumors to assess the relationship of BRAF mutation to immune markers.
Results
We found, using Cox regression models, that the presence of TILs was associated with improved OS (p = 0.034) and RFS (p = 0.002) in ulcerated melanoma tumors, but not in non-ulcerated melanoma (p = 0.632, 0.416). CD2 expression also was correlated with improved OS (p = 0.021) and RFS (p = 0.001) in ulcerated melanoma, but no relationship was seen in non-ulcerated melanoma (p = 0.427, 0.682). In this small population, BRAF status did not correlate with TILs or CD2+ count.
Conclusion
Our data show that immune markers including TILs and CD2 count correlate more closely with survival in ulcerated melanomas than that in non-ulcerated melanomas. We propose that immune biomarkers may be particularly relevant to ulcerated, as compared to non-ulcerated, melanomas and that this merits study in larger populations.



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Abbreviations
- AJCC:
-
American Joint Committee on Cancer
- Ang-2:
-
Angiopoietin 2
- EORTC:
-
European Organisation for Research and Treatment of Cancer
- FFPE:
-
Formalin fixed paraffin embedded
- GMC:
-
Geisinger Medical Center
- HPF:
-
High-powered field
- IHC:
-
Immunohistochemistry
- IRB:
-
Institutional review board
- ISMMS:
-
Icahn School of Medicine at Mount Sinai
- LFA-3:
-
Lymphocyte function-associated antigen-3
- OS:
-
Overall survival
- RFS:
-
Recurrence-free survival
- TILs:
-
Tumor-infiltrating lymphocytes
- TNBC:
-
Triple-negative breast cancer
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Acknowledgments
The study was funded by Dermatology Foundation (Career Development Award), American Association for Cancer Research (Landon Cancer Immunology Innovator Award), Herbert Irving Comprehensive Cancer Center at Columbia University, and Tisch Cancer Center at the Icahn School of Medicine at Mount Sinai.
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The authors have no conflict of interest to declare.
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Ellen H. de Moll and Yichun Fu have contributed equally to this article and should be considered co-first authors.
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de Moll, E.H., Fu, Y., Qian, Y. et al. Immune biomarkers are more accurate in prediction of survival in ulcerated than in non-ulcerated primary melanomas. Cancer Immunol Immunother 64, 1193–1203 (2015). https://doi.org/10.1007/s00262-015-1726-0
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DOI: https://doi.org/10.1007/s00262-015-1726-0