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Related Experiment Videos

Spontaneous neoplasms in aged CD-1 mice.

M Chandra1, C H Frith

  • 1Experimental Pathology Department, American Cyanamid Company, Pearl River, NY 10965.

Toxicology Letters
|June 1, 1992
PubMed
Summary

This study details spontaneous neoplasms in control CD-1 mice. Alveolar-bronchiolar adenomas and lymphoreticular neoplasms were most common in males and females, respectively, providing baseline data for carcinogenicity studies.

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Area of Science:

  • Veterinary Pathology
  • Toxicologic Pathology
  • Oncology

Background:

  • Spontaneous neoplasms in control animals are crucial for interpreting carcinogenicity studies.
  • Understanding the incidence and types of tumors in untreated mice provides essential baseline data.

Purpose of the Study:

  • To tabulate and analyze the incidence of spontaneous neoplasms in a large cohort of untreated CD-1 mice.
  • To establish a comprehensive reference for common tumor types and their frequencies in male and female mice.

Main Methods:

  • Evaluation and tabulation of spontaneous neoplasms.
  • Analysis of data from 725 male and 725 female CD-1 mice.
  • Identification of the most common tumor types and their respective percentages.

Main Results:

  • In male mice, common neoplasms included alveolar-bronchiolar adenomas (19.3%) and hepatocellular adenomas (11.0%).
  • In female mice, lymphoreticular neoplasms (16.4%) and alveolar-bronchiolar adenomas (12.3%) were most frequent.
  • Various other tumors occurred at lower incidences in both sexes.

Conclusions:

  • This data provides a critical baseline for spontaneous tumor incidence in CD-1 mice.
  • Findings are essential for the accurate assessment of potential carcinogenicity in drug development and toxicological research.
  • The study highlights sex-specific differences in common spontaneous neoplasm types.

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