title: Colorectal carcinoma in Poland in 1975 and 1995: not only more, but also different.
abstract: OBJECTIVE
  We previously reported that the sole clinicopathological parameters of carcinomas diagnosed in a single institution in 1975 differed from those in patients diagnosed in 1995. The findings might be compatible with the loss of importance of the microsatellite instability of the carcinogenic pathway.
  
  
  METHODS
  We examined the microsatellite status and selected immunomarkers (Ki-67, p53, BAX) in the archival material from 1975 (n=76) and 1995 (n=105).
  
  
  CONCLUSIONS
  The distribution of tumors showing no microsatellite instability, low microsatellite instability, and high microsatellite instability in the 2-yearly cohorts was similar (1975: 55.6%, 22.2%, 22.2%; 1995: 60.2%, 20.4%, 19.4%, respectively). The percentage of carcinomas showing microsatellite instability at the APC locus differed significantly (1975: 37.5%; 1995: 21.4%). The typical clinicopathological parameters of carcinomas exhibiting high microsatellite instability were largely shared by the carcinomas demonstrating instability at the APC locus. The carcinomas resected in 1995 more frequently demonstrated high expression of an antiapoptotic protein BAX and a different distribution of their Ki-67 proliferation fraction. The evolution of colorectal carcinoma in Poland also involves qualitative changes, including its genetic background.
authors.affiliation: Department of Pathomorphology, Collegium Medicum, Jagiellonian University, Cracow, Poland.
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Rudzki
authors.forename: Monika
authors.initials: M
authors.lastname: Zazula
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Okoń
authors.forename: Jerzy
authors.initials: J
authors.lastname: Stachura
mesh_terms: D000230:Adenocarcinoma / Q000453:epidemiology* / Q000235:genetics* / Q000473:pathology; D000328:Adult; D000368:Aged; D001483:Base Sequence; D014408:Biomarkers, Tumor / Q000032:analysis*; D015331:Cohort Studies; D015179:Colorectal Neoplasms / Q000453:epidemiology* / Q000235:genetics* / Q000473:pathology; D046508:Culture Techniques; D005260:Female; D016158:Genes, p53 / Q000235:genetics*; D020022:Genetic Predisposition to Disease / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D019394:Ki-67 Antigen / Q000032:analysis*; D008297:Male; D018895:Microsatellite Repeats; D008875:Middle Aged; D008969:Molecular Sequence Data; D011044:Poland / Q000453:epidemiology; D016133:Polymerase Chain Reaction / Q000379:methods; D012189:Retrospective Studies; D012307:Risk Factors; D012680:Sensitivity and Specificity
chemical_list: D014408:Biomarkers, Tumor; D019394:Ki-67 Antigen