Fig. 1
From: Two cases of spindle cell tumors with S100 and CD34 co-expression showing novel RAF1 fusions
Histologic and immunohistochemical features of RAF1-rearranged tumors. A, Neurofibroma like tumor in a 30-year-old male showing slatternly arranged short spindle cells with striking perivascular rings of collagen (case1 ; ×20). B, LSFT -like tumor in a 15-year-old male showing diffusely arranged spindle cells without obvious atypia and mitotic figures (case 2; ×20). C, E, Immunohistochemical studies showing diffuse S100 and CD34 positivity (case1 ; ×20). D, F, Immunohistochemically, the tumor cells showed diffuse expression of S100 and CD34 (case 2; ×20)