Microscopic features of the patient’s original tumor. (A, B) Histological appearance of the original tumor. H&E staining showed a multinodular proliferation of eosinophilic epithelioid and spindle-shaped cells with prominent areas of hemorrhage. (C- L) Immunohistochemical reactivity in the original tumor. Tumor cells were diffusely positive for AE1/AE3 (C), CAM5.2 (D), EMA (E), vimentin (F), CD31 (G), CD34 (H) and CA 125 (I), but negative for INI-1 (J) and factor VIII-related antigen (K). Positive rate of Ki-67 was approximately 50% (L). Scale bars: 100μm.