Fig. 1

Histological aspects of the ovarian teratoma (a-f) and the normal appendix (g). Views of the organoid colonic/appendiceal wall inside the ovarian teratoma at the top, composed of mucosa, muscularis mucosae, submucosa and muscularis propria, with dissociated mucus at left, close to some squamous teratomatous element at the bottom, without any magnification (a) and with low-power magnification Gx25 (b). Focus on colonic/appendiceal LAMN comprising elongated glands layered by mild atypical proliferating cells producing mucin at magnification Gx50 (c), Gx100 (d) and Gx200 (e). View of other teratomatous elements, mostly of cutaneous epithelium and glands at magnification Gx50 (f), and of the histologically normal appendix without magnification (g)