Search results
Results From The WOW.Com Content Network
Each time the cell divides, there is a possibility for mutations to occur and the chance of tumor formation increases. [1] The tumor is caused when the germ cells in the ovaries begin divide uncontrollably and become malignant which are characterized with their less organized nuclei and unclearly defined border. [1]
Germ cell tumor accounts for about 30% of ovarian tumors, but only 5% of ovarian cancers, because most germ-cell tumors are teratomas and most teratomas are benign. Malignant teratomas tend to occur in older women, when one of the germ layers in the tumor develops into a squamous cell carcinoma . [ 26 ]
An oocyte (/ ˈ oʊ ə s aɪ t /, oöcyte, or ovocyte is a female gametocyte or germ cell involved in reproduction. In other words, it is an immature ovum, or egg cell. An oocyte is produced in a female fetus in the ovary during female gametogenesis. The female germ cells produce a primordial germ cell (PGC), which then undergoes mitosis ...
The 1997 International Germ Cell Consensus Classification [17] is a tool for estimating the risk of relapse after treatment of malignant germ-cell tumor. A small study of ovarian tumors in girls [ 18 ] reports a correlation between cystic and benign tumors, and conversely, solid and malignant tumors.
In contrast, the epithelial cells originate from the outer epithelial lining surrounding the gonad while the germ cell tumors arise from the precursor cells of the gametes, hence the name germ cell. [1] In humans, this group accounts for 8% of ovarian cancers and under 5% of testicular cancers. Their diagnosis is histological: only a biopsy of ...
Ovarian tumors: Germ cell tumor: Seen most often in young women or adolescent girls. Other germ cell tumors are: Endodermal sinus tumor and teratoma, [25] Ovarian cancer: includes ovarian epithelial cancer [26] [27] [28] Luteoma: Seen in pregnancy: Ovaritis: Synonym of oophoritis [16] Ovarian remnant syndrome: Incomplete removal of tissue ...
Ovarian stem cells are oocytes formed in ovarian follicle before birth in female mammals. They do not form post-natally , and are depleted throughout reproductive life. [ 1 ] In humans it is estimated that 500,000–1,000,000 primordial follicles are present at birth, decreasing rapidly with age until roughly age 51 when ovulation stops ...
The germ cell nest (germ-line cyst) forms in the ovaries during their development. The nest consists of multiple interconnected oogonia formed by incomplete cell division. The interconnected oogonia are surrounded by somatic cells called granulosa cells. Later on in development, the germ cell nests break down through invasion of granulosa cells.