Invasiv is a Latin-origin term meaning "eindringend" or "intrusive." In medical contexts, it refers to procedures or processes that involve entering or crossing body surfaces or tissues, such as invasive diagnostic or therapeutic interventions, or the invasion of surrounding tissues by a malignant tumor. It can also describe instruments or methods that penetrate the body (e.g., certain biopsies, catheterizations), as well as pathogens that invade tissues. In ecology, “invasiv” describes species that spread into new areas and disrupt existing ecosystems. Key nuances:

• Medical use: describes procedures that require entering the body or causing tissue disruption. Examples include biopsies, endoscopy, or surgical incisions. Some procedures aim to minimize invasiveness (e.g., minimally invasive techniques like laparoscopic surgery) to reduce tissue damage and recovery time.
• Oncology: characterizes tumor growth that penetrates neighboring tissues and structures, potentially enabling access to blood or lymphatic systems for metastasis.
• Microbiology: denotes organisms that penetrate and colonize host tissues.
• Ecology: refers to non-native species that spread and cause ecological or economic harm.

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