American Association for Cancer Research

April 2009 CEBP Highlights

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Selected Articles from the April 1, 2009 Issue

The articles referenced in this Highlights section will be available online in HTML and PDF formats to all interested users at no charge until the next issue of Cancer Epidemiology, Biomarkers & Prevention is published. Click on the article title to view the complete article.

View the Table of Contents for the April 2009 issue of Cancer Epidemiology, Biomarkers & Prevention


Survivors of Childhood Cancer

Mariotto et al.

Page 1033

The last 35 years have seen substantial improvements in the treatment of childhood cancer. As a result, children diagnosed with cancer today can expect to be long-term cancer survivors, facing unique and often uncharacterized health challenges. To investigate the size of this survivor population, Mariotto and colleagues used data from the SEER program from 1975 to 2005 as well as historical trends from the Connecticut Cancer Registry. They report that as of 2005, over 328,000 survivors of childhood cancer were living in the United States with 24% surviving more than 30 years after diagnosis. The cancer sites with the largest number of survivors include brain, lymphoid leukemia, germ cell tumors, and Hodgkin’s lymphoma. Careful and continued evaluation of these cancer survivors will yield important information about the long-term effects of cancer therapies. 
 

Cervical Cancer Risk Factors

Cervical cancer is the most common cancer among women worldwide. Two important studies in this issue access the number of sexual partners and the age of first intercourse (AFI) as risk factors for the development of cervical cancer. Edelstein and colleagues report a population-based study among cervical cancer cases diagnosed between 1986 and 2004 in the metropolitan Seattle area (n = 333). They report that the age of cervical cancer diagnosis was 3.1 years younger for cases reporting AFI <15 years, compared with AFI ≥ 19. The report finds several cases where the interval between AFI and cervical cancer diagnosis was ≤ 10 years, consistent with rapid-onset cervical cancer. This study supports recommendations for HPV vaccination during early adolescence and the initiation of Pap smears no earlier than 3 years following AFI. In a larger collaborative reanalysis, Appleby and colleagues from The International Collaboration of Epidemiological Studies of Cervical Cancer, combined data from 21 studies to evaluate AFI and number of sexual partners as risk factors for cervical carcinoma. This study included over 15,000 cases of invasive cervical carcinoma or cervical intraepithelial neoplasia grade 3. Appleby and colleagues report that the risks of invasive carcinoma increase with higher numbers of sexual partners. In addition, they report that cervical cancer risks increase with younger AFI, consistent with the study from Edelstein and colleagues.



Physical Fitness and Digestive System Cancers

Peel et al.

Page 1111

Digestive system cancers are the second leading cause of cancer related death of men in the United States. Higher levels of physical activity are inversely associated with the risk of colon cancer but the associations between physical activity and other digestive system cancers are not clear. Peel and colleagues examined the association of cardiorespiratory fitness (CRF) and digestive system cancer mortality in a prospective study of 38,801 men. CRF was established with a treadmill exercise test, and mortality was assessed over 29 years of follow-up. Men in the high CRF group (most fit) had lower risks of mortality from colon, colorectal and liver cancer compared with those in the low CRF group (least fit). These studies support a protective role of physical activity on the risk of digestive system cancer mortality.


Triple-negative breast cancer (TNBC) refers to tumors lacking estrogen receptors, progesterone receptors, and HER2. Unfortunately, the most successful treatments for breast cancer target these three receptors. The etiology of TNBC appears unique from non-TNBC, but few studies have evaluated these etiological differences. Dolle and colleagues evaluated risk factors for TNBC in women under 45, with respect to demographics, reproductive histories and oral contraceptive (OC) use. This study found that OC use ≥ 1 year was associated with increased risk for TNBC but not for non-TNBC and illustrates important differences in the risk of OC use for specific breast cancer subtypes. 


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