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This edition incorporates several key changes, including newly recognized entities such as EWSR1::SMAD3-rearranged fibroblastic tumor, neurotrophic tyrosine receptor kinase (NTRK)\u2013rearranged spindle cell neoplasm, superficial CD34-positive fibroblastic tumor, and CRTC1::TRIM11 cutaneous tumor. Diagnostic terminology has also been refined; for example, the term \u2018atypical intradermal smooth muscle neoplasm\u2019 replaces \u2018cutaneous leiomyosarcoma\u2019 for lesions confined to the dermis, whereas the designation leiomyosarcoma is reserved for tumors with overt subcutaneous infiltration. In addition, epithelioid fibrous histiocytoma has been reassigned to the family of tumors of uncertain differentiation. 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