نتایج جستجو برای: familial breast cancer
تعداد نتایج: 1032090 فیلتر نتایج به سال:
background: brca1 and brca2 genes have been recognized to be responsible for 20-30% of hereditary breast cancers and approximately 50% of familial breast and ovarian cancers. therefore, the demand for brca1 and brca2 mutation screening is rapidly increasing as their identification will affect medical management of people at increased risk. because of high costs involved in analysis of brca1 a...
abstract bachground and aim: mutation analysis of mitochondrial genome and brca genes are helpful in the early diagnosis of familial breast cancers. in this study, we investigated mitochondrial common deletion and brca mutations through multiplex pcr and clinical parameters for the detection of familial breast cancers in archival breast cancer samples. methods: the multiplex pcr was conducted o...
background: germ-line mutations of brca1 and brca2 genes are responsible for approximately 25-30% of dominantly inherited familial breast cancers; still a big part of genetic component is unknown. the aim of this study was to investigate genetic causes of familial breast cancer in a pedigree with recessive pattern of inheritance. methods: we applied exome sequencing as a useful approach in hete...
This is a retrospective descriptive - analytical study on determination of the relationship between breast cancer and first class familial background in women suffered from breast cancer in hospitals of Tehran university of medical sciences in 1997.The investigated units consisted of 659 women suffered from breast cancer. The samples were randomly assigned into 2 groups, 320 women suffering fro...
Background : After lung cancer, breast cancer is the second cause of mortality among women. Although the prevalence of this disease has been increased, but the rate of mortality has not been changed during last three decades, this may be due to early diagnosis at the first stage of disease . Objective : To determine risk factors of breast cancer in women. Design : It was a case- control s...
Background: Hormones and genetics play a critical role in breast cancer development, determining the association between plasma hormones and breast cancer risk among familial and non-familial females may provide insight into the etiology of breast cancer. Material and Methods: 140 postmenopausal females during the period between June 2007 and May 2011 were enrolled in this study, 83 were breast...
OBJECTIVE To compare the risk factors such as age, menopause, menarche, age at the first pregnancy, number of pregnancies and breast feeding period between the familial and non-familial breast cancer females in Jordan. METHODS This study was carried out in Al-Basheer Hospital, Amman, Jordan during the period 2000 and 2002. A questionnaire was used to collect information from 99 females who we...
p53 gene is one of the most tumor suppressor genes that causes more than 50 percent of the human cancers. Considering the daily rise in the incidence of breast cancer in various parts of the world , including Iran , there was a great need for a molecular study for determination of P53 ...
Japanese breast cancer families were collected and classified into the following 7 types according to the onset age and the distribution of other cancers in the family lines; early-onset type, late-onset type, familial breast-ovarian cancer type, familial breast-prostate cancer type, familial breast-thyroid cancer type, familial male and female breast cancer type and multiple primary cancer typ...
The contribution of BRCA1 and BRCA2 to familial and non-familial forms of breast cancer has been difficult to accurately estimate because of the myriad of potential genetic and epigenetic mechanisms that can ultimately influence their expression and involvement in cellular activities. As one of these potential mechanisms, we investigated whether allelic imbalance (AI) of BRCA1 or BRCA2 expressi...
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