Extremely rare case of successful treatment of metastatic ovarian undifferentiated carcinoma with high-dose combination cytotoxic chemotherapy: A case report

Figure 2 Pathologic findings. A: Tumor cell nests such as round to oval nuclei, prominent nucleoli, and many atypical mitotic figures are observed in the neutrophilic background; B and C: These cells are immunoreactive to pan-cytokeratin, but negative for vimentin (VMT) (B) and focally to VMT (C); D: Geographic necrosis is common with myxoid matrix; E: In some areas, sarcomatoid features are frequently observed; F: Tumor cells showing no organoid feature directly admixed with stromal components and were immunoreactive to VMT. CK: Cytokeratin; VMT: Vimentin.