Figure 2

Tumor Pathology. At the primary surgery, the tumor was diagnosed as an adenosarcoma containing a benign epithelial component (an endometriotic gland, bottom left) surrounded by an atypical hypercellular stromal component (A; ×200). However, the autopsy following the rapid tumor regrowth revealed malignant stromal components with sarcomatous overgrowth (D; ×200). At autopsy, the expression levels of estrogen (E) and progesterone (F) receptors were reduced compared to those at the primary surgery (B and C, respectively).