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Cancer - Principles & Practice of Oncology
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1999-06-07
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10 lines
FIGURE 7-1. The pathogenesis of cancer metastasis. To produce
metastases, tumor cells must detach from the primary tumor, invade the
ECM and enter the circulation, survive in the circulation to arrest in
the capillary bed, adhere to subendothelial basement membrane, gain
entrance into the organ parenchyma, respond to paracrine growth
factors, proliferate and induce angiogenesis, and evade host defenses.
The pathogenesis of metastasis is therefore complex and consists of
multiple sequential, selective, and interdependent steps whose outcome
depends on the interaction of tumor cells with homeostatic factors.