If so it'd be an invasive species not from another place, but another time. (dotearth.blogs.nytimes.com)
Since surgery is an invasive procedure, we help you consider your options and then you can make an informed decision regarding your pet. (loop494vet.com)
Both of these conditions are definitively diagnosed by biopsy of the GI tract, which is an invasive surgical procedure. (vetbabble.com)