There is increasing evidence suggesting that short telomeres and subsequent genomic instability contribute to malignant transformation. Telomere shortening has been described as a mechanism to explain genetic anticipation in dyskeratosis congenita and Li-Fraumeni syndrome. Since genetic anticipation has been observed in familial breast cancer, we aimed to study telomere length in familial breas...

The present study aimed to investigate risk factors for early onset breast cancer that are related to lifestyle and psychological stress. A comparative case-control study was performed among patients from the Department of Breast Surgery in Shanghai Cancer Center of Fudan University. The information regarding risk factors associated with the development of early onset breast cancer was collecte...

Mutations in BRCA1 account for the majority of familial aggregations of early onset breast and ovarian cancer (~70%) and about 1/5 of all early onset breast cancer families; in contrast, mutations in BRCA2 account for a smaller proportion of breast/ovarian cancer families and a similar proportion of early onset breast cancer families. BRCA2 has also been shown to be associated with a much more ...

BACKGROUND Germline mutations in p53 are associated with the Li-Fraumeni Syndrome which is characterized by childhood cancers, including pediatric adrenal cortical carcinomas and early onset breast cancer. The high incidence of adrenal cortical carcinomas in southern Brazil is mostly attributed to the R337H mutation in TP53. The relatively high population frequency of this mutation in southern ...

Early age at onset is generally considered an indicator of genetic susceptibility to breast cancer. To address both the proportion of early-onset breast cancer associated with BRCA-1 or BRCA-2 germline mutation and the contribution of germline mutations to the clinical features and outcome of these tumors, we analyzed molecular status and clinical variables of a population-based sample of 66 It...

background: we studied the patterns of premenopausal and postmenopausal breast cancer incidence and its established risk factors in iran in 2010. in addition, we estimated the 5-year prevalence of breast cancer in the country. methods: we performed an internet and library literature review. we used national cancer registry data, demographic health surveys, national censuses and world bank data ...

Essential meiotic endonuclease 1 homolog 1 (EME1) is a key DNA repair protein that participates in the recognition and repair of DNA double-strand breaks. Deficiency of the EME1 gene can lead to spontaneous genomic instability and thus contribute to tumorgenesis. We hypothesized that the exon variants of EME1 confer genetic susceptibility to breast cancer. In a case-control study of 748 breast ...

OBJECTIVE To correlate mutations in BRCA1 and BRCA2 with family history of breast cancer in a first-degree relative for women diagnosed with breast cancer before age 45 who do not have a personal or family history of ovarian cancer. METHODS Family history for women with breast cancer diagnosed before age 45 was provided by ordering physicians via a test requisition form designed for this purp...

breast cancer is the most common cancer occurring among women. the mortality rate of breast cancer can be reduced by regular breast cancer screening program. this study was carried out to identify the knowledge and practice of women about breast cancer screening in zahedan, southeast of iran. in this cross- sectional study, 384 women were selected as an improbability sample of women referring t...