Results of immunohistochemical assessment for RIPK1 protein showed only a few tumor cells (< 1%) were positive for RIPK1, while dual immunofluorescence to detect RIPK1 and either MITF or MelA showed no concurrent expression of the proteins, suggesting that the RIPK1-expressing cells were not melanoma cells [32]. The gene discussed is RIPK1; the disease is neoplasm.