Figure 3.
(A) Hematoxylin-eosin stain. The biopsy specimen of the right medial rectus muscle showing tumor cells (arrows) infiltrating muscle fibers; 400x. (B) Cytokeratin 7 immunohistochemistry of the specimen showing tumor cells (arrows); 400x
(A) Hematoxylin-eosin stain. The biopsy specimen of the right medial rectus muscle showing tumor cells (arrows) infiltrating muscle fibers; 400x. (B) Cytokeratin 7 immunohistochemistry of the specimen showing tumor cells (arrows); 400x