What is a cumulus oophorus cyst?
Cumulus oophorus refers to an appearance in the ovary in which multiple granulosa cells enlarge around a developing oocyte. These support cells (“cumulus cells”) serve multiple functions in the maturation of the oocyte.
What is the purpose of cumulus oophorus?
Functions. Functions of the cumulus oophorus include coordination of follicular development and oocyte maturation. Mechanisms of the latter include stimulation of amino acid transport and sterol biosynthesis and regulation of oocyte gene transcription.
What is the difference between cumulus oophorus and corona radiata?
The corona radiata is the innermost layer of the cells of the cumulus oophorus and is directly adjacent to the zona pellucida, the inner protective glycoprotein layer of the ovum. Cumulus oophorus are the cells surrounding corona radiata, and are the cells between corona radiata and follicular antrum.
What does Oophorus mean?
egg-bearing little cloud
Appropriately, cumulus oophorus means “egg-bearing little cloud.” As a sperm enters the cumulus oophorus, the enzyme hyaluronidase on the sperm head dissolves hyaluronic acid, a major component of the cementing material found between the cells of the cumulus oophorus as well as between other cells in the body.
When does the Cumulus Oophorus form?
The cumulus oophorus expands after ovulation due to the deposition of a proteoglycan matrix. The major carbohydrate in this muco-elastic matrix is hyaluronic acid (Ball et al. 1982; Salustri et al. 1999).
What causes cumulus expansion?
Cumulus expansion is based on extracellular matrix synthesis by cumulus cells. Hyaluronic acid is the most abundant component of this extracellular matrix. Cumulus expansion takes place during meiotic oocyte maturation under in vivo and in vitro conditions.
Why is corona radiata important?
The corona radiata is an important group of nerves because of its role in sending and receiving messages between regions in the brain. The corona radiata is composed of both afferent and efferent fibers that connect the cerebral cortex and the brain stem.
What is the function of a corona radiata in a ovum cell?
Corona Radiata: the corona radiata surrounds an egg and consists of two or three layers of cells from the follicle. They are attached to the zona pellucida – the outer protective layer of the egg – and their main purpose is to supply vital proteins to the cell.
What do cumulus cells secrete?
Progesterone is the sperm chemoattractant secreted by the cumulus cells. Many substances have been shown to chemotactically guide mammalian spermatozoa, some of them such as bourgeonal and lyral were not yet identified in the female reproductive tract.
What is cumulus oophorus in Hindi?
Cumulus oophorus (cumulus proligerus) meaning in Hindi (हिन्दी मे मीनिंग ) is अंडधर पुंज.
Where do cumulus cells originate?
Background/Aim: Cumulus cells (CCs) originate from the membrane granulosa cells and surround oocytes during follicle maturation. CCs produce high levels of hyaluronan that targets CD44, which is a major tumorigenic marker.
What is cumulus expansion?
During the preovulatory period, cumulus cells change from a compact cell mass into a dispersed structure of cells for the synthesis and deposition of a mucoid intercellular matrix, a process referred to as cumulus expansion.
Is the cumulus oophorus a sign of ovulation?
Cumulus oophorus. It comprises a collection of the cells in a mature follicle that protrude into the cavity of the follicle. It is a sign of imminent ovulation, but its absence has little significance in predicting the maturity of the oocyte. On ultrasound, the cumulus oophorus appears as a cyst along the wall of the dominant follicle.
Can a Doppler ultrasound show cancer of the cervix?
Ultrasound hypoechoic, heterogeneous mass involving the cervix may show increased vascularity on color Doppler although cervical cancer is staged clinically, ultrasound can be a useful adjunct by showing
How old is the average person with cervical carcinoma?
Develop a comprehensive, clinically relevant MR imaging examination for the assessment of uterine cervical carcinoma. Cervical carcinoma is the third most common gynecologic malignancy, with an average patient age at onset of 45 years (, 1,, 2 ).
How is dynamic gadolinium-enhanced imaging used in cervical cancer?
Only the pelvic region is examined with T1-weighted imaging. Dynamic gadolinium-enhanced imaging is useful for evaluating small, enhancing cervical lesions, detecting or confirming invasion of adjacent organs, and identifying fistulous tracts (, 10,, 11 ).
