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Morphologic spectrum of NTRK3 rearranged sarcomas with a high-grade MPNST-like phenotype and S100 expression. A-C, High-grade MPNST-like sarcoma with EML4-NTRK3 fusion (case 3); A, cellular fascicular monomorphic spindle cell sarcoma; B, multifocal S100 expression; C, diffuse staining for pan-TRK. MPNST, malignant peripheral nerve sheath tumor [Color figure can be viewed at wileyonlinelibrary.com]
