Fig. 2

Proliferation of vimentin-positive round cells, which were released from the ovarian surface epithelium. The majority of cells expressed diameters of 10–15 μm (a–d). However, there were some smaller cells among them that expressed diameters of around 5 μm (e–h); these smaller cells expressed cytoplasmic positivity for vimentin. Among these smaller cells were bigger vimentin-positive cells (arrows), which formed clusters and possibly originate from smaller cells (e–h). (Inverted microscope: a–d, magnifications 100x and 200x; light microscope: e–h, magnification 400x). Legend: brown-vimentin positivity and blue-nuclei after HE staining. Red Bar: 10 μm for b–d and 100 μm for a, e–h