Giant nodular fasciitis originating from the humeral periosteum: A case report

Figure 2 Hematoxylin-eosin staining. A: Localized fibrous tissue hyperplasia and hyaline degeneration [hematoxylin and eosin (HE), × 100]; B: Some areas showed extracellular mucoid matrix (HE, × 100); C: Mitotic figures (HE, × 200); D: Tumor cells are abundant and there is apparent extravasation of red blood cells (HE, × 200); E: Spindle-shaped and fibroblast-like tumor cells (HE, × 100); F: Spindle-shaped tumor cells with stromal mucous degeneration (HE, × 100).