After looking up the definitions I don't think that the core needle biopsy could cause it:
Lymphovascular invasion (LVI or lymphovascular space invasion) is the invasion of a cancer to the blood vessels and/or lymphatics.

Lymph: A clear or white fluid that travels through vessels, moves within tissues and work to keep all the parts of the body clean. Vascular: The body's network of blood vessels. When cancer spreads to lymph and vascular system, it is thus termed as Lymphovascular Invasion.

Just sharing this to help clear up if possible.

Biopsy is where they take needle and go into the node and take out samples of it.

OK, I googled it:
What is the difference between Lymph node biopsy and lymph node dissection:
Lymph node biopsy and lymph node dissection are two procedures used to remove lymph nodes for testing. Lymph node biopsy involves making a small cut in the skin and removing a lymph node. If more than one lymph node is taken, the biopsy is called a lymph node dissection. Lymph node dissection allows the doctor to take a bigger sample than a needle biopsy. It removes more axillary lymph nodes than a sentinel node biopsy does. However, it is more likely to affect arm function and cause lymphedema. Sentinel node biopsy is the preferred first step to check the axillary lymph nodes.

A biopsy is a procedure to remove a piece of tissue or a sample of cells from your body so it can be examined by a pathologist. It can be done with a needle, which takes a sample of the tissue, or it can be an excisional biopsy, where the tissue is excised from the site. In a sentinel node biopsy, they take the entire lymph node, or nodes, so it’s an excisional biopsy. The sentinel nodes are axillary lymph nodes. They are just the first ones that cancer would spread to. If those are clear, they don’t need to take anymore. If there is cancer found in the sentinel nodes, then the next step would be an axillary dissection, which removes as many more as the surgeon feels is needed.
I used to work in a medical lab. Retired 3 years ago. This is what I remember from working in the pathology area.

Well @A MyBCTeam Member that was the most simplest of explanations of all. Of course thats what a biopsy is. We all have had biopsies. Sheesh! lol

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