Fig. 3
From: Struma ovarii and peritoneal strumosis during pregnancy
Pathology examination of resected ovarian mass and pelvic nodules. Haematoxylin-eosin staining showed thyroid follicles consistent with struma ovarii. a and b show pathology examination of the left ovarian mass. c and d were from the wall of the sigmoid colon and the surface of the uterus, respectively. The teratoma contained entirely thyroid tissue (b and d) composed of follicles filled with eosinophilic colloid material and lined by a single layer of cuboidal or columnar epithelial cells with uniform bland nuclei and eosinophilic cytoplasm (a and c)