Figure 3.

(A) A characteristic feature of malignant gastrointestinal neuroectodermal tumors, multinucleated OLGCs, was identified (H&E staining, original magnification ×400). (B) Scattered OLGCs were positive for cluster of differentiation 68 immunostaining, but tumor cells were negative, indicating that the OLGCs were not tumor-derived, in contrast to the tumor-derived giant cells of conventional clear cell sarcomas (immunohistochemistry; original magnification, ×400). OLGC, osteoclast-like giant cell.