Diagnosis of ovarian cancer
Is inhibin a useful serum marker for postmenopausal women with epithelial ovarian cancer? It is often diagnosed in an advanced clinical stage stage III or IV and the long-term survival rate is low. One of the reasons is that the available diagnostic tests are limited by their sensitivity and specificity characteristics.
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The early detection of ovarian cancer is the key to reduce the mortality and morbidity. It is known that CA is used for the diagnosis and follow-up of epithelial ovarian cancer, and inhibin is a sensitive marker for mucinous and granulosa-cell tumors of the ovary.
But there are some studies which suggest that diagnosis of ovarian cancer inhibin is also elevated in some postmenopausal women with epithelial ovarian tumors. Inhibin is an ovarian hormone involved in the regulation of fertility, decreasing to undetectable levels at menopause.
Its increase in postmenopausal women with epithelial ovarian cancer led to a series of studies which evaluated the possibility of inhibin being a serum marker for epithelial ovarian cancer. Despite the numerous reviews, the exact role of inhibin in epithelial ovarian cancer has not been established yet.
It is accepted that combinations of biomarkers may improve ovarian cancer detection.
Inhibin may diagnosis of ovarian cancer one of these, but larger studies are needed to prove its accurate utility in epithelial ovarian cancer. Finding the particularities of serous type of ovarian cancer which secrete inhibin may lead to some conclusions. Also, it is essential to determine the mechanism through which inhibin level is increased in women with epithelial ovarian cancer.
Keywords inhibin, epithelial ovarian cancer, serum marker Rezumat Cancerul ovarian este una dintre cele mai frecvente cauze de deces la femei, iar cancerul ovarian epitelial este cel mai frecvent tip. Este diagnosticat adesea într-un stadiu clinic avansat stadiul III sau IViar rata de supravieţuire pe termen lung este scăzută. Unul dintre motive este că testele de diagnostic disponibile au specificitate şi sensibilitate limitate.
Detectarea precoce a cancerului ovarian este cheia pentru reducerea mortalităţii şi morbidităţii. Este cunoscut faptul că CA este utilizat pentru diagnosticarea şi urmărirea cancerului ovarian epitelial, iar inhibina este un marker sensibil pentru tumorile mucinoase şi de granuloasă ale ovarului. Există însă unele studii care sugerează că inhibina este crescută şi la unele femei aflate în postmenopauză, cu tumori ovariene epiteliale. Inhibina este un hormon ovarian implicat în reglarea fertilităţii, fiind nedetectabilă la menopauză.
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Creşterea sa la femeile aflate în postmenopauză cu cancer ovarian epitelial a condus la o serie de studii care au evaluat posibilitatea ca inhibina să fie un marker seric pentru cancerul ovarian epitelial. În ciuda numeroaselor cercetări, nu a fost încă stabilit un rol exact al inhibinei în cancerul ovarian epitelial. Este acceptat faptul că unele combinaţii de biomarkeri pot îmbunătăţi detectarea diagnosis of ovarian cancer ovarian.
Inhibina poate fi unul dintre aceştia, dar sunt necesare studii mai mari pentru a demonstra utilitatea exactă a acesteia în cancerul ovarian epitelial. Descoperirea particularităţilor tipului de cancer ovarian seros care secretă inhibină poate duce la unele concluzii. De asemenea, este esenţial să se determine mecanismul prin care are loc creşterea nivelului de inhibină la femeile cu cancer de ovar epitelial.
Cuvinte cheie inhibină cancer ovarian epitelial marker seric Ovarian cancer is the second most common gynecologic cancer in developed countries and the third most common gynecologic malignancy in developing countries 1.
It represents the fifth leading cause of death in women in Europe and the United States 2. The disease is usually diagnosed in an advanced stage. This is due to the nonspecific symptomatology, which appears when cancer has already spread throughout the abdominal cavity, and the lack of some specific options for screening.
Despite significant effort to develop new therapies, late diagnosis is still associated with a low treatment efficacy and a high mortality. Although during the years new diagnostic or screening methods for epithelial ovarian cancer have been introduced on a regular basis, these did not significantly improve the treatment outcome 3.
Early diagnosis is still the best option to reduce mortality caused by epithelial ovarian diagnosis of ovarian cancer EOC. More specific strategies for screening and diagnosis diagnosis of ovarian cancer have a great impact in the treatment outcome. In addition, it is considered that finding some prognostic factors should be useful for selecting the patients with poor prognosis for a more aggressive therapy 4,5.
The combination of CA and vaginal ultrasonography is the most frequently used screening strategy for the patients with family history of ovarian cancer. Moreover, researchers have tried to combine other serum markers HE4, inhibin, CEA, CA or multimodal tests to improve the detection of malignant pathology of the ovary.
Not all strategies could show a high sensitivity and specificity for the diagnosis of epithelial ovarian cancer. They are associated with a high rate of false-positive tests and the risk of more invasive testing and treatment 6. Some studies reveal that combinations of biomarkers and imaging may improve ovarian cancer detection, but further studies are needed to validate these hypotheses 6,7.
Diagnosis of ovarian cancer, Traducere "ovarian cancer" în română Conținutul The utility of immunohistochemistry in the diagnosis of ovarian carcinoma Ultrasound investigation shows Learning objectives To illustrate and correlate key radiological and imaging findings which may provide a correct diagnosis. To identify thespecific features of tumors in each imaging modality. Read more Background Ovariantumors in pediatric population are uncommon compared to adult females, but not rare, only with a different incidence profile.
There are some reports in the literature on inhibin level in women with epithelial ovarian carcinoma 4,8. It is known that the serum total inhibin is a sensitive marker for diagnosis and monitoring of mucinous and granulosa-cell tumors of the ovary.
Its levels decrease significantly after surgery and increase in case of recurrence. But some studies reflect that inhibin is also elevated in epithelial ovarian tumors 9.
Cancerul ovarian - teste diagnostice
Inhibins are members of the transforming growth factor diagnosis of ovarian cancer TGFb family, a group of growth factors with similar structure but with different functions. Inhibin is synthesized as a dimeric glycoprotein consisting of an a subunit and one of two b subunits bA, bB. Inhibin A is produced by the dominant ovarian follicle and the corpus luteum.
Inhibin B, on the papillomas in lymphedema hand, is released from the smaller follicles More exactly, inhibin has been isolated from follicular fluid and is produced by the granulosa cell layers of the follicle 13, It is produced by the ovaries and secreted into the bloodstream and behave as an endocrine factor. It specifically inhibits the secretion of the follicle-stimulating hormone FSHa pituitary hormone which promotes ovarian folliculogenesis.
In turn, FSH stimulates inhibin production in the gonads, regulating fertility through a FSH-inhibin negative-feedback mechanism 9. At menopause, with the depletion of ovarian follicles, serum inhibin levels decrease to nondetectable levels and serum FSH increase 9, It is established that inhibin serum diagnosis of ovarian cancer is a useful test for detecting and monitoring the recurrence of granulosa-cell tumors GCT and mucinous tumors of the ovary, but elevated inhibin levels were also reported in women with EOC 9,11, Blaakaer et al.
They showed the correlation between an elevated inhibin level and a decreased FSH level in the group of women with EOC On the contrary, in a study on postmenopausal women with suspected ovarian cancer, Healy et al.
The concentrations fell after tumor removal Also, it was revealed that serous tumors secrete inhibin-related peptides, but not dimeric inhibin A Other data suggested that serum a inhibin precursor pro-aC levels were more often raised in women with EOC than dimeric inhibin A and Band pro-aC associated with CA may be useful as a biomarker for EOC in postmenopausal women On the other hand, Frias et al. Menon et al.
Other studies investigating the total inhibin as serum marker for epithelial ovarian tumors showed that the combination between CA and serum inhibin may be useful for noninvasive diagnosis of EOC 8, It concluded that stroma of EOC is the main source of the secretion of serum a inhibin. Dimeric inhibin A production may be the result of combined secretion of the a subunit by tumor stroma and the bA subunit by epithelium.
However, the mechanism of the inhibin and activin in the development of EOC remained unclear 4, Tournier et al. Despite the numerous reviews, an exact role of inhibins precursors, subunits and mature molecules of diagnosis of ovarian cancer in epithelial ovarian cancer has not been established yet.
It has been recognized that various forms of this type of cancer produce members of the inhibin family, but the precise molecules of these products are not yet defined. The researchers admitted the importance of inhibins in epithelial ovarian tumors, but further studies are needed to prove the clinical utility in the diagnosis of ovarian cancer, management and prognosis, and also as a factor in the pathogenesis of these tumors.
Due to late diagnosis and high mortality of women diagnosed with ovarian cancer, there is an imperative need for new serum markers for epithelial ovarian cancer which can improve the sensitivity and specificity of markers already used for the early diagnosis and management.
Diagnosis of ovarian cancer, Traducere "ovarian cancer" în română
The discovery of a serum marker for epithelial ovarian cancer could represent an important step toward the screening of this disease. Inhibin may be one of these, but additional and diagnosis of ovarian cancer studies are needed to establish its accurate utility in epithelial ovarian cancer.
It is known that only some EOC have high serum inhibin levels. Finding the particularities of serous type of ovarian cancer which secrete inhibin may lead to some conclusions. Also, it is essential to determine the mechanism through which inhibin levels are increased diagnosis of ovarian cancer women with EOC.
Global cancer statistics, CA Cancer J Clin.
Cancer statistics. Ultrasound Obstet Gynecol. Serum Inhibin A and Inhibin B levels in epithelial ovarian cancer patients. PLoS One. Preoperative serum level of inhibin A is an independent prognostic factor for the survival of postmenopausal women with epithelial ovarian carcinoma.
Doctor in stiinte medicale Cancerul ovarian ramane principala cauza de deces prin cancer de origine ginecologica si a 4-a cauza de deces prin cancer la femei, la nivel mondial. In Europa, rata mortalitatii este intre 3,6 si 9,3 la
Serum biomarkers for evaluation of an adnexal mass for epithelial carcinoma of the ovary, fallopian tube, or peritoneum. The complementary role of imaging and tumor biomarkers in gynecological cancers: An update of the literature. Asian Pac J Cancer Prev. Total inhibin is a potential serum marker for epithelial ovarian cancer.