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a H&E×20—Showing tumor composed of round or oval cells with ill defined outlines, abundant granular eosinophillic cytoplasm, prominent nucleoli with nuclear pleomorphism with moderate atypia and areas of spindling with perineural invasion. b H&E×20—Granular cell tumor with lymphatic invasion. c IHC×20—Tumor cells showing immunopositivity to CD 56. d IHC×20—30 % of the tumor cells positivity to Ki-67
