Diffusion-Weighted MRI and FDG-PET in Diagnosis of Endometrial Stromal Nodule

Figure 3

Macroscopic and microscopic findings of the uterine tumor. (a) Macroscopic appearance of the uterine tumor. Uterus is opened by longitudinal incision through the anterior wall. Note that huge polypoid tumor grows from posterior wall of the uterus. The tumor is connected to the posterior myometrium with wide pedicle. (b) Microscopic finding in low-power field (HE staining). One finger-like projection is protruded into the myometrium. Note that the length between the tumor-myometrium interface and the tip of the tumor protrusion does not exceed 3 mm. (c) Microscopic finding in high-power field (immunostaining with Ki-67 antibody). Note that numerous tumor cells are positive for Ki-67, a cell proliferation marker. On average, mitotic activity is estimated to be 3 mitotic figures/10 high-power fields.