Postoperative multiple metastasis of clear cell sarcoma-like tumor of the gastrointestinal tract in adolescent: A case report

Figure 3 Optical microscopy and molecular pathology fluorescence in situ hybridization. A: The tumor cells were diffusely arranged, separated by a slender fibrous diaphragm [hematoxylin and eosin (HE) 200×]; B: Immunohistochemical staining revealed S-100 positivity (Envision, 200×); C: Immunohistochemical staining revealed CD34 positivity (Envision, 200×); D: Immunohistochemical staining revealed 30% positivity for Ki-67 (Envision, 200×); E: total of 100 tumor cells were detected and counted, and the number of positive cells was 46%. EWSR1 gene breakage occurred in this case.