There is a constant balance in cancer cells between division and death. The
malignant phenotype is associated with a continuing cell cycle or 'immorta
lization'. Telomeres, structures that cap the chromosomes, are related to c
ell longevity and are regulated by a ribonucleoprotein called telomerase. T
his review describes the possible roles of telomeres and telomerase in the
malignant process. Eur J Gastroenterol Hepatol 13:889-890 (C) 2001 Lippinco
tt Williams & Wilkins.