TP53 and carcinosarcoma: The tumor comprised HGSC and chondrosarcoma, and the left fallopian tube contained STIC confirmed by positive staining of p53 and WT-1 on immunohistochemistry (Figures 2 and 3), whereas the peritoneal nodule shows carcinosarcoma with a high-grade serous carcinoma component and a chondrosarcoma component, having weak positivity for p53 and WT-1 (Figure 4).