The short answer
Lymphovascular invasion (LVI) means the pathologist saw cancer cells inside small blood or lymph vessels in the tissue that was removed. Because those vessels are how cancer can travel, LVI is a signal that can raise the estimated risk of spread. It does not prove the cancer has spread, and it is one of several factors your team weighs when planning treatment.
LVI means cancer cells were found inside small blood or lymph vessels in the sample.
It can raise the estimated risk that cancer could spread, so teams factor it into planning.
It does not prove cancer has actually spread to lymph nodes or other organs.
It's one input among grade, stage, and biomarkers.
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The full explanation.
Where you'll see this phrase
In the pathology report, often abbreviated LVI and listed as "present" or "absent" (sometimes "identified" / "not identified"). You may also see the related term perineural invasion (cancer cells around nerves).
What it means in plain language
Tissue is threaded with tiny blood and lymph vessels. If the pathologist sees cancer cells sitting inside those vessels, that's lymphovascular invasion. Because vessels are the "roads" cancer can use to travel, finding cancer inside them suggests a pathway for possible spread exists.
Why it may matter
LVI is a risk signal. For several cancer types, its presence slightly raises the estimated chance that cancer could spread, which can influence whether additional treatment or closer monitoring is recommended.
What it does not mean
- LVI does not prove the cancer has already spread. It describes cells inside vessels in the sample — not a metastasis.
- It does not decide your outcome by itself.
What context is still needed
The weight given to LVI depends on the cancer type and everything else in your report. Your care team is the right source for what it means in your case.
Words to know
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Common questions
▸Does lymphovascular invasion mean the cancer is in my lymph nodes?
Not necessarily. LVI describes cancer cells inside vessels in the sample. Whether nodes are involved is assessed separately, often by examining removed nodes.
▸Does LVI change my treatment?
It can. For some cancers, LVI nudges teams toward additional treatment or closer follow-up. Your oncologist will explain whether it changes anything for you.
Questions to ask your doctor
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Your next step
Plain-language definitions for the words on your report.
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