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Related Experiment Videos

p53 expression in incidental prostatic cancer

P J Van Veldhuizen1, R Sadasivan, R Cherian

  • 1Department of Medicine, Veterans Administration Medical Center, Kansas City, Missouri.

The American Journal of the Medical Sciences
|May 1, 1993
PubMed
Summary
This summary is machine-generated.

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Abnormal p53 expression is common in incidental prostate cancer, suggesting it

Area of Science:

  • Oncology
  • Molecular Biology
  • Uropathology

Background:

  • Incidental prostate cancer is often considered indolent.
  • However, recent data indicate up to 27% of cases may progress long-term.
  • This challenges the assumption of infrequent p53 gene mutations.

Purpose of the Study:

  • To investigate the frequency of abnormal p53 expression in incidental prostate cancer.
  • To determine if p53 alterations are an early event in malignant transformation.

Main Methods:

  • Archival specimens from 24 Stage A1 prostate cancer patients were analyzed.
  • Immunohistochemical technique using monoclonal antibody (PAb 240) was employed.
  • 36 tumor microfoci and 4 prostatic intraepithelial neoplasia areas were evaluated for p53 expression.

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Main Results:

  • Abnormal p53 expression was detected in 13 (36%) microfoci with intense staining (2+).
  • An additional 8 (22%) microfoci showed intermediate staining.
  • Four areas of prostatic intraepithelial neoplasia also exhibited positive p53 staining (2+).

Conclusions:

  • Abnormal p53 expression is a significant feature in a notable proportion of incidental prostate carcinomas.
  • The presence of p53 alterations in early lesions suggests it is an early event in malignant phenotype development.
  • This finding has implications for understanding the progression of incidental prostate cancer.