Micrograph of a<unk>  ovarian<unk> . H&E stain.<unk><unk> s are part of the surface epithelial-stromal<unk>  group of ovarian neoplasms, and account for approximately 36% of all ovarian<unk> s. Approximately 75% are benign, 10% are borderline and 15% are malignant. Rarely, the<unk>  is seen bilaterally; approximately 5% of primary<unk><unk> s are bilateral. Benign<unk><unk> s are typically multilocular (have several lobes), and the cysts have a smooth lining of epithelium that resembles endocervical epithelial cells with small numbers of gastrointestinal-type epithelial cells. Borderline and malignant<unk><unk> s often have papillae and solid areas. There may also be hemorrhage and necrosis. Pathology sample of a<unk><unk>  of the ovary. It is well documented that malignancy may be only focally present in<unk>  neoplasms of the ovary, so thorough sampling is imperative. The major distinguishing features of<unk><unk> s are that the<unk> s are filled with a mucus-like material, which gives them their name; this mucus is produced by mucus-secreting goblet cells very similar to the cells lining normal intestine. These<unk> s may become very large, some have been weighed as large as 25 kilograms. Cystadenocarcinomas (malignant<unk> s) contain a more solid growth pattern with the hallmarks of malignancy: cellular atypia and stratification, loss of the normal architecture of the tissue, and necrosis. The appearance can look similar to colonic cancer. Clear stromal invasion is used to differentiate borderline<unk> s from malignant<unk> s. Pseudomyxoma peritonei may present as a result of an<unk> , however this is a rare cause of this condition, which is a rare condition. A more common cause of pseudomyxoma peritonei is a mucin-producing<unk>  of the appendix. Since<unk><unk> s arising from the ovary usually only involve one ovary, the presence of involvement in both ovaries with a<unk><unk>  suggests that the<unk>  may have arisen in another location, and further study is warranted. The risk of<unk><unk> s is significantly associated with smoking: relative risk for current smokers 2.22 (2.22 times the risk for non-smokers) and 2.02 for past smokers. Risk is also associated with smoking duration: relative risk per 20 years was 1.44. See article by Tworoger SS in Cancer March 1, 2008 using data from the Nurses Health Study.
Ovarian mucinous tumor
Ovarian fibroma
Ovarian serous cystadenoma
Ovarian cyst
Ovarian germ cell tumors
Follicular cyst of ovary
Clear-cell ovarian carcinoma
Paraovarian cyst