Fig. 4: Rosette-like structures in Spitz melanoma with NTRK1 fusion.
From: Spitz melanoma is a distinct subset of spitzoid melanoma
Case 3—TPM3-NTRK fusion. a Low power view demonstrates a dome shaped lesion with mild epidermal thinning. b High power shows epithelioid to spindled melanocytes with rosette-like structures (arrows in b), a feature that can be seen in Spitz tumors with NTRK1 fusions. c Mitotic figures in the deep dermis are easily recognized.
