What is the most common type of primary ovarian tumor?

The most common type of primary ovarian tumor is the serous cystadenoma. These tumors are characterized by a cystic structure filled with serous fluid and are typically lined by epithelial cells. They most often arise from the surface epithelium of the ovary. Serous cystadenomas are frequently benign and account for a significant proportion of all ovarian tumors, making them the most prevalent type.

In addition to their common occurrence, serous tumors can also exhibit varying degrees of malignancy, but when focused on the benign forms, the cystadenomas hold the highest incidence. This widespread prevalence in the benign category contributes to their status as the most common primary ovarian tumor.

Other types of ovarian tumors, such as granulosa cell tumors, mucinous cystadenomas, and embryonal carcinomas, are comparatively less frequent. Granulosa cell tumors represent hormone-producing tumors that can be malignant but are less common overall. Mucinous cystadenomas are also significant but not as prevalent as serous cystadenomas. Embryonal carcinoma is a type of germ cell tumor that is rare and mostly seen in younger women. Thus, while these other tumor types exist, serous cystadenomas remain the leading type in terms of prevalence among