Digital quantification of TrkA immunostaining revealed higher TrkA staining intensities in the nevi tissue groups (h-score = 95.29, IQR 67.79–111.2) compared to primary melanomas (h-score = 37.01, IQR 7.758–76, p < 0.0001) and metastases (h-score = 2.421, IQR 1.491–4.261, p < 0.0001) (Figure 5G). Here, NTRK1 is linked to melanoma.