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  • Chemistry  (2)
  • BRCA1  (1)
  • Breast neoplasms  (1)
  • Hereditary susceptibility  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Hereditary susceptibility to colorectal cancer (1996)
    Springer
    Diseases of the colon & rectum 39 (1996), S. 739-743 
    Details
    ISSN: 1530-0358
    Keywords: Colorectal cancer ; Family history ; Hereditary nonpolyposis colorectal cancer ; Hereditary susceptibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Close relatives of patients with colorectal cancer are at an increased risk of developing a colorectal malignancy themselves. PURPOSE: A study was conducted to compare risks in relatives of patients diagnosed at different ages. METHODS: Family histories were taken from two cohorts of patients with colorectal cancer: Group A, a population group of 65 patients diagnosed at or under 45 (median, 42) years; Group B, 212 patients of all ages (median, 68 years) treated in a single surgeon's practice. RESULTS: Overall relative risk of colorectal cancer in first-degree relatives was 5.2 in Group A and 2.3 in Group B. There was familial clustering of colorectal cancers suggestive of hereditary nonpolyposis colorectal cancer in 13 (20 percent) families to Group A but to only 3 (1.5 percent) families in the second group. Cumulative incidence of colorectal cancer for relatives of the young cohort rose steeply from 40 years, reaching 5 percent at age 50 years and 10 percent at age 70 years. This contrasts with risk for relatives of older patients, in whom the shape of the curve resembles that of the overall population risk, reaching 5 percent at age 70 years and 10 percent at age 80 years. CONCLUSIONS: There appears to be a quantitative and qualitative increase in risk to relatives of patients diagnosed at a young age compared with those diagnosed later to life, at least part of which is likely to be the result of a hereditary susceptibility. Close relatives of early onset cases warrant more intensive endoscopic screening and at an earlier age than relatives of patients diagnosed at older ages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02054437
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  • 2
    Electronic Resource
    Electronic Resource
    BRCA1 and BRCA2 and Breast Cancer Incidence: A Review (1999)
    Springer
    Annals of oncology 10 (1999), S. 113-119 
    Details
    ISSN: 1569-8041
    Keywords: BRCA1 ; BRCA2 ; inherited susceptibility ; penetrance ; linkage mapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background. Epidemiological studies have repeatedly shown that having a family history is a risk factor for female (and male) breast cancer. Some rare families have many (4 or more) cases of early onset breast cancer (some of which also include women with ovarian cancer) which are most clearly explained by an autosomal dominant gene with high penetrance. Design. Families with multiple cases of early onset breast (and/or ovarian cancer) have been studied using linkage analysis with the intention of finding the chromosomal region containing such genes. Results. Two predisposition genes, BRCA1 and BRCA2, have been mapped and cloned. Mutations in these genes confer increased risks of cancer, although the precise level of the increased risk is still unclear. The majority of families with four or more cases of breast cancer diagnosed under the age of 60 years are due to mutations in BRCA1 or BRCA2. Conclusions. The importance of these two genes to familial breast cancer and to breast cancer incidence overall is becoming clearer, the current information is reviewed. The findings can be immediately translated into clinical practice for these multiple case families. The identification of such families raises a number of other important clinical questions concerning patient management.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008358419310
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Familial risk and genetic susceptibility for breast cancer (1994)
    Springer
    Cancer causes & control 5 (1994), S. 458-470 
    Details
    ISSN: 1573-7225
    Keywords: Breast neoplasms ; case-control studies ; familial risk ; genetics ; pedigree analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Clinical observations suggest that breast cancer is occasionallyinherited as an autosomal dominant disease in families. Epidemiologic studies consistently have shown that a history of breast cancer in a first-degree relative increases a woman's risk of breast cancer when compared with the general population. The risk is similar if a mother or sister is affected and is increased further if both are affected. The difficulty with such an observation is that in itself it does not clarify the nature of the true underlying risk factors which could be genetic or due to the aggregation of environmental risk factors in families. Complex segregation analysis of breast cancer aggregation in families suggests that breast cancer susceptibility is due to an autosomal dominant inheritance of one or more rare genes in a few families in which carriers have a high probability of developing the disease perhaps as great as 100 percent. Close linkage of a breast-cancer-susceptibility gene (BRCA1), between markers of the chromosomal region 17q12-q21 on the long arm of chromosome 17, with breast cancer recently has been reported. Families linked to BRCA1 were more likely to have early onset of breast cancer or have breast and ovarian cancer in the family. It is likely that other genes play a role in the unlinked breastcancer families. Both the epidemiologic and genetic data suggest that breast cancer is a heterogeneous disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01694760
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Combined pyrolysis and radiochemical gas chromatography for studying the thermal degradation of epoxy resins and polyimides. I. The degradation of epoxy resins in nitrogen between 400°C and 700°C (1970)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 14 (1970), S. 205-223 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The thermal degradation of a bisphenol A-based epoxy resin (EP 274) cured with 4,4′-diaminodiphenyl methane (DDM) and with phthalic anhydride (PA) was studied using a radiochemical pyrolysis gas chromatography technique. Conclusive evidence for some of the degradation mechanisms of these resins was obtained by pyrolyzing samples containing various 14C-labelled groups and analyzing the products using this method.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1970.070140120
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  • 5
    Electronic Resource
    Electronic Resource
    Combined pyrolysis and radiochemical gas chromatography for studying the thermal degradation of epoxide resins and polyimides. II. Degradation of polyimides (1970)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 14 (1970), S. 345-354 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The thermal degradation of aromatic polyimides in nitrogen at 700°C was studied using pyrolysis gas chromatography, infrared spectroscopy, and radiochemical techniques. Degradation mechanisms were postulated to account for the breakdown products found and to explain variations in the ratio of carbon monoxide to carbon dioxide.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1970.070140209
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    Paper (German National Licenses)
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