Call-Exner bodies are small, spherical structures found in the ovarian tissue of women with certain types of ovarian tumors. These structures are composed of granulosa cells, which are responsible for producing hormones. While the term "Call-Exner bodies" is widely used, there are a number of synonyms used to describe these structures, including Call-Exner nests, Call-Exner pearls, and small follicles. Additionally, some researchers describe these structures as "reversed" or "reversed follicles," as they represent an abnormality in the development of ovarian follicles. While the terminology may vary, these structures are a key diagnostic feature in the identification of certain types of ovarian tumors.