American Cancer Society

About: American Cancer Society is a nonprofit organization based out in Atlanta, Georgia, United States. It is known for research contribution in the topics: Cancer & Population. The organization has 1339 authors who have published 3700 publications receiving 688166 citations. The organization is also known as: American Cancer Society, ACS & American Society for the Control of Cancer.

The changing pattern of lung carcinoma.

Abstract: In a study of 505 cases of lung carcinoma from a period in which there was a significant change in tobacco-smoking habits, a dramatic shift in the histologic type and location of the lung tumors was observed. Peripheral tumors, found in 30.7% of the carcinomas occurring before 1978, were found in 42% of the carcinomas from 1986 to 1989. The corresponding decrease in the centrally originating bronchial carcinoma was from 69.3% to 57.3%. The greatest change in histologic cancer type was that the incidence of bronchioloalveolar carcinoma more than doubled from 9.3% in the earlier period to 20.3% percent in the 1986-to-1989 period. Corresponding to the decreasing incidence of lung carcinoma, there is a decrease in cancers related to cigarette smoking. A study of cases of lung carcinoma among nonsmokers and former smokers showed a decreased incidence of the bronchiogenic cancers and an increase of cancer occurring in the peripheral lung parenchyma. This finding should be validated in other population-based studies, and if confirmed, new studies should be undertaken in an attempt to discover the factors that play a role in the development of such cancers. As an example, viral oncogenes may be a possibility. Viruses were suggested in the past as being related to the development of some of these tumor types.

Psychological adjustment of cancer caregivers with multiple roles.

Abstract: Guided by the role strain and the role enhancement theories, this study examined the effect of caregivers' multiple roles, such as being employed and taking care of minors in their household, on their psychological adjustment. Of the caregivers who completed the American Cancer Society's Quality of Life Survey for Caregivers, 457 caregivers who were middle-aged (18-64) and provided complete data for the study variables were included in the analyses. The indicators of the outcome variables, namely, the levels of the caregivers' psychological adjustment, were cancer caregiving stress, management of meaning out of providing care, and negative and positive affect. Multivariate general linear modeling analyses revealed that employed caregivers who were also taking care of children reported higher levels of caregiving stress and negative affect. In contrast, employed caregivers who were not taking care of children reported greater levels of managing meaning of caregiving experience. The findings provide partial support for the role strain theory, that the more social roles a caregiver carries out, the more likely the caregiver is to experience stress and negative affect. The findings also suggest that when providing care for cancer survivors, caregivers may benefit from being employed. These findings have significant implications for developing targeted programs to reduce the psychological distress of cancer caregivers with multiple roles and to assist them in recognizing their caregiving experience as meaningful.

Characterizing associations and SNP-environment interactions for GWAS-identified prostate cancer risk markers-results from BPC3

Abstract: Genome-wide association studies (GWAS) have identified multiple single nucleotide polymorphisms (SNPs) associated with prostate cancer risk. However, whether these associations can be consistently replicated, vary with disease aggressiveness (tumor stage and grade) and/or interact with non-genetic potential risk factors or other SNPs is unknown. We therefore genotyped 39 SNPs from regions identified by several prostate cancer GWAS in 10,501 prostate cancer cases and 10,831 controls from the NCI Breast and Prostate Cancer Cohort Consortium (BPC3). We replicated 36 out of 39 SNPs (P-values ranging from 0.01 to 10−28). Two SNPs located near KLK3 associated with PSA levels showed differential association with Gleason grade (rs2735839, P = 0.0001 and rs266849, P = 0.0004; case-only test), where the alleles associated with decreasing PSA levels were inversely associated with low-grade (as defined by Gleason grade <8) tumors but positively associated with high-grade tumors. No other SNP showed differential associations according to disease stage or grade. We observed no effect modification by SNP for association with age at diagnosis, family history of prostate cancer, diabetes, BMI, height, smoking or alcohol intake. Moreover, we found no evidence of pair-wise SNP-SNP interactions. While these SNPs represent new independent risk factors for prostate cancer, we saw little evidence for effect modification by other SNPs or by the environmental factors examined.

The impact of the rising colorectal cancer incidence in young adults on the optimal age to start screening: Microsimulation analysis I to inform the American Cancer Society colorectal cancer screening guideline

Abstract: Background In 2016, the Microsimulation Screening Analysis-Colon (MISCAN-Colon) model was used to inform the US Preventive Services Task Force colorectal cancer (CRC) screening guidelines. In this study, 1 of 2 microsimulation analyses to inform the update of the American Cancer Society CRC screening guideline, the authors re-evaluated the optimal screening strategies in light of the increase in CRC diagnosed in young adults. Methods The authors adjusted the MISCAN-Colon model to reflect the higher CRC incidence in young adults, who were assumed to carry forward escalated disease risk as they age. Life-years gained (LYG; benefit), the number of colonoscopies (COL; burden) and the ratios of incremental burden to benefit (efficiency ratio [ER] = ΔCOL/ΔLYG) were projected for different screening strategies. Strategies differed with respect to test modality, ages to start (40 years, 45 years, and 50 years) and ages to stop (75 years, 80 years, and 85 years) screening, and screening intervals (depending on screening modality). The authors then determined the model-recommended strategies in a similar way as was done for the US Preventive Services Task Force, using ER thresholds in accordance with the previously accepted ER of 39. Results Because of the higher CRC incidence, model-predicted LYG from screening increased compared with the previous analyses. Consequently, the balance of burden to benefit of screening improved and now 10-yearly colonoscopy screening starting at age 45 years resulted in an ER of 32. Other recommended strategies included fecal immunochemical testing annually, flexible sigmoidoscopy screening every 5 years, and computed tomographic colonography every 5 years. Conclusions This decision-analysis suggests that in light of the increase in CRC incidence among young adults, screening may be offered earlier than has previously been recommended. Cancer 2018;124:2964-73. © 2018 The Authors. Cancer published by Wiley Periodicals, Inc. on behalf of American Cancer Society.