Fig. 5

Histological examination of the surgical specimen of the ovary showed that the main part of the tumor had a trabecular pattern, but an insular pattern was also observed in some sections of the tumor, original magnification, × 200 (a), more than 2 mitosis per 10 high-power field, original magnification, × 400 (b) and foci of necrosis, original magnification, × 400 (c). Immunohistochemistry analysis of a tumor sample from the right ovary demonstrating positive detection of synaptophysin, original magnification, × 200 (d), CgA, × 200 (e), and staining index for Ki-67 was between 10 and 15%, × 200 (f)