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Organ vascularity and metastatic frequency

L Weiss, K Haydock, J W Pickren

    The American Journal of Pathology
    |October 1, 1980
    PubMed
    Summary

    The hemodynamic theory of metastasis, suggesting organ blood flow dictates cancer spread, was tested. While overall blood flow showed no correlation, organ blood flow per gram correlated with metastasis in cancers draining via the portal system.

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    Area of Science:

    • Oncology
    • Medical Physiology
    • Cancer Metastasis Research

    Background:

    • The hemodynamic theory posits that organ metastasis frequency is determined by cancer cell delivery via arterial blood.
    • Previous testing was limited by the lack of reproducible, noninvasive organ blood flow measurements.

    Purpose of the Study:

    • To investigate the correlation between organ blood flow and metastatic frequency in humans.
    • To test the validity of the hemodynamic theory of metastasis across different organ systems.

    Main Methods:

    • Correlated metastatic frequency data with organ blood flow measurements in patients with primary cancers from 15 anatomic sites.
    • Analyzed data for 10 organs, considering organ weight, blood volume, and blood flow parameters.
    • Compared correlations for cancers with venous drainage into the portal system versus the caval system.

    Main Results:

    • No significant correlation was found between metastatic frequency and overall organ weight, blood volume, or blood flow.
    • A significant correlation (4-8% level) was observed between organ blood flow per gram and metastatic frequency for cancers draining into the portal system (4 of 5 groups).
    • A weaker correlation was found for cancers draining into the caval system (1 of 10 groups).

    Conclusions:

    • The hemodynamic theory of metastasis shows partial compliance, particularly for cancers with portal venous drainage.
    • Further research is needed to explain why only certain cancer types align with the hemodynamic theory.
    • Organ blood flow per gram may play a role in metastasis, but the mechanism is not fully understood.

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