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The Gastric Precancerous Cascade | 9206
Journal of Clinical & Experimental Pathology
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Although most gastric cancers are first detected after the 5
decade of life, they represent the end product of a prolonged
precancerous process initiated during childhood as a consequence of the infection of the gastric mucosa with
. The initial phase of the process consists of active nonatrophic gastritis. The following stages are: intestinal metaplasia,
first complete and then incomplete, dysplasia and finally invasive carcinoma. The progression of the lesions is modulated by
other factors such as the diet: excessive salt intake accelerates the process while fresh fruits and vegetables play a protective role.
Remarkably, the geographic location influences the process. In Colombia, the high altitude Andes mountain dwellers display
more advanced lesions than their counterparts of the Pacific coast. It appears that the ancestral origin of the infecting bacteria
have a determining influence on their capacity to induce precancerous lesions. The bacteria infecting the mountain dwellers are
Amerindian in origin and display a European genotype. Bacteria infecting the Pacific coast dwellers are of Africa origin, less
virulent. Chemoprevention trials have been partially effective, when the lesions are not too far advanced. Such trial may not
eliminate the infection but have a tendency to eliminate preferentially the most virulent bacteria.
Pelayo Correa was born in Sonson, Colombia on 3 July 1927. He received his MD in 1949 from the Universidad de Antioquia in Medellin and served
on the faculty of the Universidad del Valle School of Medicine in Cali from 1954 until 1970. He was a Visiting Scientist at the US National Cancer
Institute from 1970 to 1973, and then joined the faculty of Louisiana State University Medical Center, New Orleans, where he was Professor of
Pathology from 1974 through 2005. In 1996 he was designated as a Boyd Professor, the highest academic rank in the LSU System. After retirement
from LSU he joined the faculty of Vanderbilt University Medical Center where he continues to do research. He is the founder of the Cancer Registry
in Cali, Colombia, the first population-based registry in Latin America, and was a leader in the development of the SEER Louisiana Tumor Registry in
New Orleans. He is the author of over 500 publications and is the Principal Investigator of an NCI Program Project on the etiology of gastric cancer,
which has been continuously funded since 1980. He has received numerous awards and honors for his seminal contributions to the natural history
of gastric carcinogenesis.
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