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Ovarian tumors by incidence and risk of ovarian cancer, with mature cystic teratoma at bottom and immature teratoma at right. [ 55 ] Embryonal teratomas most commonly occur in the sacrococcygeal region; sacrococcygeal teratoma is the single most common tumor found in newborn humans.
Ovarian germ cell tumors (OGCTs) are heterogeneous tumors that are derived from the primitive germ cells of the embryonic gonad, which accounts for about 2.6% of all ovarian malignancies. [1] There are four main types of OGCTs, namely dysgerminomas , yolk sac tumor , teratoma , and choriocarcinoma .
A teratoma is a tumor of germ cell origin, containing tissues from more than one germ cell line, [2] [3] [4] It can be ovarian or testicular in its origin. [4] and are almost always benign. [5] An immature teratoma is thus a very rare tumor, representing 1% of all teratomas, 1% of all ovarian cancers, and 35.6% of malignant ovarian germ cell ...
A cystic teratoma with a small Rokitansky nodule — region of thickened cyst wall (bottom part of image). In gynecology , a Rokitansky nodule is a mass or lump in an ovarian teratomatous cyst . [ 1 ]
A struma ovarii (literally: goitre of the ovary) is a rare form of monodermal teratoma that contains mostly thyroid tissue, which may cause hyperthyroidism. [1]Despite its name, struma ovarii is not restricted to the ovary.
Serous ovarian cancer is the most common type of epithelial ovarian cancer and it accounts for about two-thirds of cases of epithelial ovarian cancer. [28] Low-grade serous carcinoma is less aggressive than high-grade serous carcinomas, though it does not typically respond well to chemotherapy or hormonal treatments. [ 28 ]
Ovarian tumors, or ovarian neoplasms, are tumors in the ovary. [1] Not all are ovarian cancer. [1] They consist of mainly solid tissue, while ovarian cysts contain fluid. [2]In 2020, the World Health Organization (WHO) divided ovarian tumours as 90% epithelial, 3% germ cell, and 2% sex cord-stromal types.
Micrograph of a mucinous ovarian tumor. H&E stain. Mucinous tumors are a type of ovarian tumor. [1] [2] They are typically large. [3] They are part of the surface epithelial-stromal tumor group of ovarian neoplasms, and account for approximately 36% of all ovarian tumors. [4] Approximately 75% are benign, 10% are borderline and 15% are ...