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. Author manuscript; available in PMC: 2020 Sep 1.
Published in final edited form as: Genes Chromosomes Cancer. 2019 Apr 17;58(9):643–649. doi: 10.1002/gcc.22755

FIGURE 2.

FIGURE 2

Microscopic appearance of the index malignant OFMT case (OFMT#1) showing monomorphic ovoid spindle cells with an infiltrative growth within the muscle (A, 200×), arranged in solid sheets (A, 200×) and cords within a hyalinized stroma (B, 100×). Higher power shows cohesive epithelioid tumor cells with nuclear atypia and increased mitotic activity (C, 400×). Immunohistochemistry shows focal expression of S100 (D, 100×) and diffuse staining for cytokeratin (E, AE1:AE3, 100×) and TFE3 (F, 200×)