https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736(17)33326-3.pdf

Global surveillance of trends in cancer survival 2000-14 (CONCORD-3): analysis of individual records for 37 513 025 patients diagnosed with one of 18 cancers from 322 population-based registries in 71 countries.

https://www.commed.vcu.edu/Chronic_Disease/2012/cochranrvwrschbias.pdf

The Cochrane Collaboration's tool for assessing risk of bias in randomised trials

https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736%2814%2962038-9.pdf

Global surveillance of cancer survival 1995–2009: analysis of individual data for 25 676 887 patients from 279 population-based registries in 67 countries (CONCORD-2)

Gliomas are the most common primary intracranial tumor, representing 81% of malignant brain tumors Although relatively rare, they cause significant mortality and morbidity Glioblastoma, the most common glioma histology (∼45% of all gliomas), has a 5-year relative survival of ∼5% A small portion of these tumors are caused by Mendelian disorders, including neurofibromatosis, tuberous sclerosis, and Li-Fraumeni syndrome Genomic analyses of glioma have also produced new evidence about risk and prognosis Recently discovered biomarkers that indicate improved survival include O⁶-methylguanine-DNA methyltransferase methylation, isocitrate dehydrogenase mutation, and a glioma cytosine-phosphate-guanine island methylator phenotype Genome-wide association studies have identified heritable risk alleles within 7 genes that are associated with increased risk of glioma Many risk factors have been examined as potential contributors to glioma risk Most significantly, these include an increase in risk by exposure to ionizing radiation and a decrease in risk by history of allergies or atopic disease(s) The potential influence of occupational exposures and cellular phones has also been examined, with inconclusive results We provide a “state of the science” review of current research into causes and risk factors for gliomas in adults

/pdf/the-epidemiology-of-glioma-in-adults-a-state-of-the-science-2iez1warx3.pdf

The epidemiology of glioma in adults: a "state of the science" review.

Some tissue types give rise to human cancers millions of times more often than other tissue types. Although this has been recognized for more than a century, it has never been explained. Here, we show that the lifetime risk of cancers of many different types is strongly correlated (0.81) with the total number of divisions of the normal self-renewing cells maintaining that tissue’s homeostasis. These results suggest that only a third of the variation in cancer risk among tissues is attributable to environmental factors or inherited predispositions. The majority is due to “bad luck,” that is, random mutations arising during DNA replication in normal, noncancerous stem cells. This is important not only for understanding the disease but also for designing strategies to limit the mortality it causes.

https://science.sciencemag.org/content/sci/347/6217/78.full.pdf

Variation in cancer risk among tissues can be explained by the number of stem cell divisions

There has been enormous progress in the treatment of childhood cancer in the developed world and the epidemiology in these countries is well described. Hitherto, there has been no attempt to systematically study the burden of childhood cancer in India or to understand how the occurrence and outcome of the disease varies across the country. We have reviewed the epidemiology (incidence, survival, and mortality) of childhood cancer across different population-based cancer registries in India and also compared it with data from the resource-rich countries. Incidence and mortality data were obtained from the National Cancer Registry Program Reports and the Cancer Incidence in 5 Continents publications. Further, a comprehensive review of medical literature was done for information on individual cancers as well as survival data. 1.6 to 4.8% of all cancer in India is seen in children below 15 years of age and the overall incidence of 38 to 124 per million children, per year, is lower than that in the developed world. The considerable inter-regional variation in incidence and mortality rates across India suggests a possible deficiency in ascertainment of cases and death notification, particularly in rural areas. The marked male preponderance of Hodgkin's disease, lower incidence of central nervous system tumors, and higher incidence of retinoblastoma merit further analysis.

Epidemiology of childhood cancer in India.

Background

There is an inequality gap between the outcome of childhood cancer in resource, rich and limited countries. Abandonment of treatment is one of the reasons for this.



Procedure

We searched the medical literature for evidence on abandonment, its causes, and any preventative interventions.



Results

Abandonment is a very real problem all across the developing world. Cancers associated with poorer prognosis seem to have higher abandonment rates. It is also related to the socio-economic and educational status of parents, travel time to treatment centers, and affordable, locally available treatment.



Conclusions

Twinning between institutions, which includes several preventative interventions, has clearly been shown to work. Pediatr Blood Cancer 2007;49:941–946. © 2007 Wiley-Liss, Inc.

The problem of treatment abandonment in children from developing countries with cancer.

Abandonment of treatment for childhood cancer: position statement of a SIOP PODC Working Group.

Iconographies supplémentaires de l'article : Abandonment of treatment for childhood cancer: position statement of a SIOP PODC Working Group

Around 25% of all tumors in those 0-14 years of age and 9% in those 15-24 years of age involve the CNS. They are the most common cause of cancer-related deaths in both age groups. In adults 25-84 years of age, the proportion of CNS tumors is 2%; 5-year overall survival is 10%-15%; and survivors have considerable morbidity. Comprehensive up-to-date population-based incidence data on these tumors are lacking. We present incidence rates for primary CNS tumors based on data derived from the high-quality national cancer registration system in England. A total of 54,336 CNS tumors of malignant, benign, and uncertain behavior were registered across the whole of England from 1995 through 2003. The age-standardized rates for all ages (0-84 years) was 9.21 per 100,000 person-years. This is higher than previously reported for England because it includes nonmalignant CNS tumors and hence gives a more accurate picture of burden of disease. The age-standardized rates for those 0-14 years of age, 15-24 years of age, and 25-84 years of age were 3.56, 3.26, and 14.57 per 100,000 person-years, respectively. In this article, we describe the changing patterns in the epidemiology of primary CNS tumors in these three age groups with respect to sex, tumor behavior, and histology using the current WHO classification. This information will provide a reference for future studies nationally and internationally and make comparisons relevant and meaningful.

Ramandeep Singh Arora

Papers

Epidemiology of childhood cancer in India.

The problem of treatment abandonment in children from developing countries with cancer.

Abandonment of treatment for childhood cancer: position statement of a SIOP PODC Working Group.

Iconographies supplémentaires de l'article : Abandonment of treatment for childhood cancer: position statement of a SIOP PODC Working Group

Age–incidence patterns of primary CNS tumors in children, adolescents, and adults in England