Morbidity and Mortality From Cancer in Cali, Colombia2

Socio‐economic class differences in cancer incidence in cali, Colombia

“…Indications of a strong socio-economic gradient were first detected by studying the distribution of cases in the different boroughs of the city (Correa and Llanos, 1966). A study of precursor lesions in autopsy and surgical specimens failed to show a socio-economic gradient in the prevalence of such lesions, suggesting that promotional rather than initiating factors are responsible for the excessive rates in lower socio-economic strata (Duque ef al., 1979).…”

Patterns of Disease Among Japanese Living in Hawaii

“…Native Japanese have a higher proportion of calcium bilirubinate stones than other people, but this change is primarily related to rural dwellers and is gradually increasing among city dwellers with a higher standard of living.16 A comparable excess of biliary tract cancer was reported in Colombia. 17 Both biliary stones and carcinoma are especially prevalent in some American Indian populations. IS It would be worthwhile to determine whether this similarity has a genetic or environmental basis.…”

Towards Understanding the Molecular Basis of Thyroid Cancer

“…61 Subsequent comparative studies of thyroid cancer incidence between areas with and without endemic goiter have not always supported that notion. 62,63 The effect of iodine supplementation on thyroid cancer incidence has also yielded conflicting results. 64 Indeed, a recent case control study from Italy suggested that the influence of iodide supplementation on cancer incidence was marginal.…”