TrkA staining intensities were also higher in compound nevi (CN, h-score = 96.34, IQR 49.01–112.3), dysplastic nevi (DN, h-score = 94.0, IQR 75.32–107.7) and thin primary melanomas (TnP, h-score = 72.95, IQR 39.66–82.0) compared with thick primary melanomas (TkP, h-score = 7.730, IQR 1.854–35.90), lymph node metastases (LNM, h-score = 2.259, IQR 1.567–4.0) and distant metastases (DM, h-score = 2.456, IQR 1.227–4.473, p < 0.0001) (Figure 5H). This evidence concerns the gene NTRK1 and melanoma.