Breast Cancer and Tumor Size Impact on Metastasis
Author Information
Author(s): S. Koscielny, M. Tubiana, M.G. Le, A.J. Valleron, H. Mouriesse, G. Contesso, D. Sarrazin
Primary Institution: Institut Gustave Roussy
Hypothesis
The study investigates the relationship between the size of the primary tumor and the probability of metastatic dissemination.
Conclusion
Larger primary tumors are associated with a higher probability of metastasis.
Supporting Evidence
- The study found a strong correlation between tumor size and the probability of metastasis.
- Patients with larger tumors had a shorter median delay before metastasis appeared.
- The threshold volume for metastasis initiation was identified as 23.6ml.
- Histological grade and number of involved lymph nodes influenced the probability of metastasis.
- Patients with no involved lymph nodes had a significantly larger V50 value.
- Data from the study supports the idea that earlier detection of tumors can reduce mortality.
Takeaway
If a breast tumor is bigger, it is more likely to spread to other parts of the body.
Methodology
The study analyzed clinical data from 2648 breast cancer patients treated between 1954 and 1972, focusing on tumor size and metastasis occurrence.
Potential Biases
Selection bias may have occurred as patients with larger tumors often received pre-operative radiotherapy.
Limitations
The study excluded male patients and those with multifocal or bilateral tumors, which may limit generalizability.
Participant Demographics
All participants were female patients with invasive breast carcinomas treated at a single institution.
Statistical Information
P-Value
p<0.001
Confidence Interval
19.3-28.8 months
Statistical Significance
p<0.001
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