Tumor Size and Metastasis in Prostate Cancer Mice
Author Information
Author(s): J.L. Ware, E.R. DeLong
Primary Institution: Duke University Medical Center
Hypothesis
Is the size of the subcutaneous tumor a significant determinant of lymphatic metastasis in this experimental system?
Conclusion
The study found that larger subcutaneous tumors are associated with a higher likelihood of lymphatic metastasis in nude mice.
Supporting Evidence
- 73% of mice sacrificed 21 days after injection had lymphatic metastases.
- Volume of the tumor at day 20 was a significant predictor of metastasis.
- Weight of the tumor at sacrifice also positively influenced metastasis.
Takeaway
Bigger tumors in mice make it more likely for cancer to spread to other parts of the body.
Methodology
The study used athymic nude mice injected with human prostate carcinoma cells and monitored tumor growth and metastasis over time.
Potential Biases
Potential bias from using mice from different suppliers was minimized by randomization.
Limitations
The study was limited to a specific mouse model and may not fully represent human cancer behavior.
Participant Demographics
Male athymic nude mice, 6-8 weeks old.
Statistical Information
P-Value
0.004
Statistical Significance
p=0.004
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