Wide Margin

In most biopsies and cancer surgeries, veterinarians aim for wide margins. The margins are the healthy tissue around the mass that is removed along with the mass. Removing this extra tissue is a good idea, because it may contain tumor spread that is invisible to the eye. Removing large, or “wide” margins of seemingly healthy tissue reduces the risk of the tumor recurring, or of needing a second surgery to get wider margins. Margins are considered wide if they are at least two to three centimeters, but that may change depending on the location of the tumor and the cancer type.


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