Cutaneous Squamous Cell Carcinoma Developing from Recessive Dystrophic Epidermolysis Bullosa: A Case Report and an Immunohistochemical Study

We describe a 49-year-old Japanese woman with cutaneous squamous cell carcinoma (SCC) developing from recessive dystrophic epidermolysis bullosa (RDEB). Interestingly, immunohistochemical staining revealed dense infiltration of CD163 + M2 macrophages and numerous Foxp3 + regulatory T cells (Tregs) around the tumor. Since the contribution of