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Shortened chromosomes linked to early stages of cancer development

ding 11 lesions from eight bladders, three lesions from three uterine cervixes, seven lesions from five large intestines, six lesions from three esophagi and eight lesions from six mouths. They scored the telomere lengths on a five-point scale ranging from very short to very long.

Overall, the group found telomere length abnormalities in 34 of 35 lesions studied (97 percent). Short or very short telomeres were observed in all lesions of the esophagus, large intestine and uterine cervix; in eight of 11 (72 percent) lesions of the bladder; and in seven of eight lesions of the oral cavity, which includes the mouth and throat. Ten of 35 (29 percent) lesions, particularly those of the bladder, displayed a variety of telomere lengths.

More than one million human epithelial cancers are diagnosed every year, Meeker says, and these cancers cause a half-million deaths each year.

Previous studies by the research team and others at Johns Hopkins found shortened telomeres in more than 90 percent of precancerous lesions of the prostate, pancreas and breast.


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Contact: Vanessa Wasta
wastava@jhmi.edu
410-955-1287
Johns Hopkins Medical Institutions
26-May-2004


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