Fig. 3
a A picture of the patient’s abdominal cavity. Arrow indicates a hair in the abdominal cavity. b Macroscopic appearance of the patient’s ovary. c Borderline lesion containing epithelium with severe atypia in the teratoma. d Histology of the right teratoma containing various differentiations such as squamous epithelium, hair follicles, sebaceous materials, and mucinous epithelium. e, f, and g Immunohistochemical staining of the mucinous epithelium with anti-CK7 (e), anti-CK20 (f), and anti-CDX2 (g) antibodies