prevascular phase

prevascular phase

Oncology A stable, relatively non-aggressive phase of tumor development that may persist for years, characterized by limited tumor growth; the PP may be 'switched' by an unknown mechanism to a 'vascular phase,' characterized by angiogenesis, rapid tumor growth, bleeding and metastatic potential. See Metastasis.
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3 The process of tumour vascularisation can be divided into initial prevascular phase known as angiogenic switch, leading to the phase of neovascularisation.