In simplest terms, Stage 1 refers to a single tumor with clean margins and no signs of spreading. (caninecancer.com)
Early detection and surgical removal with adequate margins is usually enough; but if clean margins are not possible, additional surgeries or radiation therapy may be needed. (wagwalking.com)
In addition to trying to get enough tissue extracted with clean margins, any nearby enlarged lymph nodes will also be removed. (caninecancer.com)