Figure 1

The microscopic examination of the left ovarian mass. A, Classic mature teratoma (haematoxylin - eosin, magnification x200); B, Malignant glandular epithelium was arising in continuity with benign mucous epithelium (haematoxylin - eosin, magnification x20); C, Tumour infiltration in the stroma (haematoxylin - eosin, magnification x20); D, Magnified malignant glandular epithelium of B from the same field (haematoxylin - eosin, magnification x 100); E, Magnified intestinal-type adenocarcinoma in the stroma of C from the same field (haematoxylin - eosin, magnification x 100).