invasion (redirected from Hostile invasion)

invasion /in·va·sion/ (-va´zhun)

1. the attack or onset of a disease.

2. the simple, harmless entrance of bacteria into the body or their deposition in tissue, as opposed to infection.

3. the infiltration and destruction of surrounding tissue, characteristic of malignant tumors.

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invasion Oncology The penetration of a basement membrane and extension into the stroma by a neoplasm which usually, but not invariably, implies a malignancy with metastatic potential. See Bulldozing invasion, Lymph node inclusions, Metastasis, Perineural invasion, Pseudoinvasion, Stabbing invasion, Vascular invasion.