Identification of NTRK3 fusions in plaque-like CD34-positive dermal fibroma.

NTRK3 gene fusions occur in a subset of plaque-like CD34-positive dermal fibromas, providing additional molecular insight into this rare superficial spindle cell lesion. Together with emerging literature, these findings support a role for recurrent kinase gene rearrangements in a subset of CD34-positive plaque-like superficial spindle cell tumours, while underscoring the continued importance of clinicopathologic correlation in defining this evolving spectrum.